diff --git a/package.json b/package.json
index 264b50d663..7943d8187e 100644
--- a/package.json
+++ b/package.json
@@ -226,7 +226,7 @@
 		"tslint": "5.15.0",
 		"tslint-sonarts": "1.9.0",
 		"typeorm": "0.2.16-rc.1",
-		"typescript": "3.3.3333",
+		"typescript": "3.5.2",
 		"typescript-eslint-parser": "22.0.0",
 		"uglify-es": "3.3.9",
 		"ulid": "2.3.0",
diff --git a/src/misc/schema.ts b/src/misc/schema.ts
index 442c95ad98..e14e6e0dd7 100644
--- a/src/misc/schema.ts
+++ b/src/misc/schema.ts
@@ -1,17 +1,3 @@
-export const types = {
-	boolean: 'boolean' as 'boolean',
-	string: 'string' as 'string',
-	number: 'number' as 'number',
-	array: 'array' as 'array',
-	object: 'object' as 'object',
-	any: 'any' as 'any',
-};
-
-export const bool = {
-	true: true as true,
-	false: false as false,
-};
-
 export type Schema = {
 	type: 'boolean' | 'number' | 'string' | 'array' | 'object' | 'any';
 	nullable: boolean;
diff --git a/src/models/repositories/app.ts b/src/models/repositories/app.ts
index 6562a470be..45d8d16c51 100644
--- a/src/models/repositories/app.ts
+++ b/src/models/repositories/app.ts
@@ -2,7 +2,7 @@ import { EntityRepository, Repository } from 'typeorm';
 import { App } from '../entities/app';
 import { AccessTokens } from '..';
 import { ensure } from '../../prelude/ensure';
-import { types, bool, SchemaType } from '../../misc/schema';
+import { SchemaType } from '../../misc/schema';
 
 export type PackedApp = SchemaType<typeof packedAppSchema>;
 
@@ -42,37 +42,37 @@ export class AppRepository extends Repository<App> {
 }
 
 export const packedAppSchema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		id: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 			description: 'The unique identifier for this Note.',
 			example: 'xxxxxxxxxx',
 		},
 		name: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			description: 'アプリケーションの名前'
 		},
 		callbackUrl: {
-			type: types.string,
-			optional: bool.false, nullable: bool.true,
+			type: 'string' as const,
+			optional: false as const, nullable: true as const,
 			description: 'コールバックするURL'
 		},
 		permission: {
-			type: types.array,
-			optional: bool.true, nullable: bool.false,
+			type: 'array' as const,
+			optional: true as const, nullable: false as const,
 			items: {
-				type: types.string,
-				optional: bool.false, nullable: bool.false,
+				type: 'string' as const,
+				optional: false as const, nullable: false as const,
 			}
 		},
 		secret: {
-			type: types.string,
-			optional: bool.true, nullable: bool.false,
+			type: 'string' as const,
+			optional: true as const, nullable: false as const,
 			description: 'アプリケーションのシークレットキー'
 		}
 	},
diff --git a/src/models/repositories/blocking.ts b/src/models/repositories/blocking.ts
index 6ee31cece8..9ebe6bbf59 100644
--- a/src/models/repositories/blocking.ts
+++ b/src/models/repositories/blocking.ts
@@ -3,7 +3,7 @@ import { Users } from '..';
 import { Blocking } from '../entities/blocking';
 import { ensure } from '../../prelude/ensure';
 import { awaitAll } from '../../prelude/await-all';
-import { SchemaType, types, bool } from '../../misc/schema';
+import { SchemaType } from '../../misc/schema';
 
 export type PackedBlocking = SchemaType<typeof packedBlockingSchema>;
 
@@ -34,30 +34,30 @@ export class BlockingRepository extends Repository<Blocking> {
 }
 
 export const packedBlockingSchema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		id: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 			description: 'The unique identifier for this blocking.',
 			example: 'xxxxxxxxxx',
 		},
 		createdAt: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'date-time',
 			description: 'The date that the blocking was created.'
 		},
 		blockeeId: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 		},
 		blockee: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'User',
 			description: 'The blockee.'
 		},
diff --git a/src/models/repositories/drive-file.ts b/src/models/repositories/drive-file.ts
index 5e7e1d40f4..702f195e9d 100644
--- a/src/models/repositories/drive-file.ts
+++ b/src/models/repositories/drive-file.ts
@@ -5,7 +5,7 @@ import { User } from '../entities/user';
 import { toPuny } from '../../misc/convert-host';
 import { ensure } from '../../prelude/ensure';
 import { awaitAll } from '../../prelude/await-all';
-import { types, bool, SchemaType } from '../../misc/schema';
+import { SchemaType } from '../../misc/schema';
 
 export type PackedDriveFile = SchemaType<typeof packedDriveFileSchema>;
 
@@ -114,63 +114,63 @@ export class DriveFileRepository extends Repository<DriveFile> {
 }
 
 export const packedDriveFileSchema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		id: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 			description: 'The unique identifier for this Drive file.',
 			example: 'xxxxxxxxxx',
 		},
 		createdAt: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'date-time',
 			description: 'The date that the Drive file was created on Misskey.'
 		},
 		name: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			description: 'The file name with extension.',
 			example: 'lenna.jpg'
 		},
 		type: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			description: 'The MIME type of this Drive file.',
 			example: 'image/jpeg'
 		},
 		md5: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'md5',
 			description: 'The MD5 hash of this Drive file.',
 			example: '15eca7fba0480996e2245f5185bf39f2'
 		},
 		size: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: 'The size of this Drive file. (bytes)',
 			example: 51469
 		},
 		url: {
-			type: types.string,
-			optional: bool.false, nullable: bool.true,
+			type: 'string' as const,
+			optional: false as const, nullable: true as const,
 			format: 'url',
 			description: 'The URL of this Drive file.',
 		},
 		folderId: {
-			type: types.string,
-			optional: bool.false, nullable: bool.true,
+			type: 'string' as const,
+			optional: false as const, nullable: true as const,
 			format: 'id',
 			description: 'The parent folder ID of this Drive file.',
 			example: 'xxxxxxxxxx',
 		},
 		isSensitive: {
-			type: types.boolean,
-			optional: bool.false, nullable: bool.false,
+			type: 'boolean' as const,
+			optional: false as const, nullable: false as const,
 			description: 'Whether this Drive file is sensitive.',
 		},
 	},
diff --git a/src/models/repositories/drive-folder.ts b/src/models/repositories/drive-folder.ts
index ef920c4326..dee424cccb 100644
--- a/src/models/repositories/drive-folder.ts
+++ b/src/models/repositories/drive-folder.ts
@@ -3,7 +3,7 @@ import { DriveFolders, DriveFiles } from '..';
 import { DriveFolder } from '../entities/drive-folder';
 import { ensure } from '../../prelude/ensure';
 import { awaitAll } from '../../prelude/await-all';
-import { SchemaType, types, bool } from '../../misc/schema';
+import { SchemaType } from '../../misc/schema';
 
 export type PackedDriveFolder = SchemaType<typeof packedDriveFolderSchema>;
 
@@ -53,47 +53,47 @@ export class DriveFolderRepository extends Repository<DriveFolder> {
 }
 
 export const packedDriveFolderSchema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		id: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 			description: 'The unique identifier for this Drive folder.',
 			example: 'xxxxxxxxxx',
 		},
 		createdAt: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'date-time',
 			description: 'The date that the Drive folder was created.'
 		},
 		name: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			description: 'The folder name.',
 		},
 		foldersCount: {
-			type: types.number,
-			optional: bool.true, nullable: bool.false,
+			type: 'number' as const,
+			optional: true as const, nullable: false as const,
 			description: 'The count of child folders.',
 		},
 		filesCount: {
-			type: types.number,
-			optional: bool.true, nullable: bool.false,
+			type: 'number' as const,
+			optional: true as const, nullable: false as const,
 			description: 'The count of child files.',
 		},
 		parentId: {
-			type: types.string,
-			optional: bool.false, nullable: bool.true,
+			type: 'string' as const,
+			optional: false as const, nullable: true as const,
 			format: 'id',
 			description: 'The parent folder ID of this folder.',
 			example: 'xxxxxxxxxx',
 		},
 		parent: {
-			type: types.object,
-			optional: bool.true, nullable: bool.true,
+			type: 'object' as const,
+			optional: true as const, nullable: true as const,
 			ref: 'DriveFolder'
 		},
 	},
diff --git a/src/models/repositories/following.ts b/src/models/repositories/following.ts
index 88fee749ae..58728a3380 100644
--- a/src/models/repositories/following.ts
+++ b/src/models/repositories/following.ts
@@ -3,7 +3,7 @@ import { Users } from '..';
 import { Following } from '../entities/following';
 import { ensure } from '../../prelude/ensure';
 import { awaitAll } from '../../prelude/await-all';
-import { SchemaType, types, bool } from '../../misc/schema';
+import { SchemaType } from '../../misc/schema';
 
 type LocalFollowerFollowing = Following & {
 	followerHost: null;
@@ -88,41 +88,41 @@ export class FollowingRepository extends Repository<Following> {
 }
 
 export const packedFollowingSchema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		id: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 			description: 'The unique identifier for this following.',
 			example: 'xxxxxxxxxx',
 		},
 		createdAt: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'date-time',
 			description: 'The date that the following was created.'
 		},
 		followeeId: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 		},
 		followee: {
-			type: types.object,
-			optional: bool.true, nullable: bool.false,
+			type: 'object' as const,
+			optional: true as const, nullable: false as const,
 			ref: 'User',
 			description: 'The followee.'
 		},
 		followerId: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 		},
 		follower: {
-			type: types.object,
-			optional: bool.true, nullable: bool.false,
+			type: 'object' as const,
+			optional: true as const, nullable: false as const,
 			ref: 'User',
 			description: 'The follower.'
 		},
diff --git a/src/models/repositories/hashtag.ts b/src/models/repositories/hashtag.ts
index a990fa3dcf..fb54a12e13 100644
--- a/src/models/repositories/hashtag.ts
+++ b/src/models/repositories/hashtag.ts
@@ -1,6 +1,6 @@
 import { EntityRepository, Repository } from 'typeorm';
 import { Hashtag } from '../entities/hashtag';
-import { SchemaType, types, bool } from '../../misc/schema';
+import { SchemaType } from '../../misc/schema';
 
 export type PackedHashtag = SchemaType<typeof packedHashtagSchema>;
 
@@ -28,43 +28,43 @@ export class HashtagRepository extends Repository<Hashtag> {
 }
 
 export const packedHashtagSchema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		tag: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			description: 'The hashtag name. No # prefixed.',
 			example: 'misskey',
 		},
 		mentionedUsersCount: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: 'Number of all users using this hashtag.'
 		},
 		mentionedLocalUsersCount: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: 'Number of local users using this hashtag.'
 		},
 		mentionedRemoteUsersCount: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: 'Number of remote users using this hashtag.'
 		},
 		attachedUsersCount: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: 'Number of all users who attached this hashtag to profile.'
 		},
 		attachedLocalUsersCount: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: 'Number of local users who attached this hashtag to profile.'
 		},
 		attachedRemoteUsersCount: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: 'Number of remote users who attached this hashtag to profile.'
 		},
 	}
diff --git a/src/models/repositories/messaging-message.ts b/src/models/repositories/messaging-message.ts
index 7f0b2047ad..d70e95bc12 100644
--- a/src/models/repositories/messaging-message.ts
+++ b/src/models/repositories/messaging-message.ts
@@ -2,7 +2,7 @@ import { EntityRepository, Repository } from 'typeorm';
 import { MessagingMessage } from '../entities/messaging-message';
 import { Users, DriveFiles, UserGroups } from '..';
 import { ensure } from '../../prelude/ensure';
-import { types, bool, SchemaType } from '../../misc/schema';
+import { SchemaType } from '../../misc/schema';
 
 export type PackedMessagingMessage = SchemaType<typeof packedMessagingMessageSchema>;
 
@@ -46,76 +46,76 @@ export class MessagingMessageRepository extends Repository<MessagingMessage> {
 }
 
 export const packedMessagingMessageSchema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		id: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 			description: 'The unique identifier for this MessagingMessage.',
 			example: 'xxxxxxxxxx',
 		},
 		createdAt: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'date-time',
 			description: 'The date that the MessagingMessage was created.'
 		},
 		userId: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 		},
 		user: {
-			type: types.object,
+			type: 'object' as const,
 			ref: 'User',
-			optional: bool.true, nullable: bool.false,
+			optional: true as const, nullable: false as const,
 		},
 		text: {
-			type: types.string,
-			optional: bool.false, nullable: bool.true,
+			type: 'string' as const,
+			optional: false as const, nullable: true as const,
 		},
 		fileId: {
-			type: types.string,
-			optional: bool.true, nullable: bool.true,
+			type: 'string' as const,
+			optional: true as const, nullable: true as const,
 			format: 'id',
 		},
 		file: {
-			type: types.object,
-			optional: bool.true, nullable: bool.true,
+			type: 'object' as const,
+			optional: true as const, nullable: true as const,
 			ref: 'DriveFile',
 		},
 		recipientId: {
-			type: types.string,
-			optional: bool.false, nullable: bool.true,
+			type: 'string' as const,
+			optional: false as const, nullable: true as const,
 			format: 'id',
 		},
 		recipient: {
-			type: types.object,
-			optional: bool.true, nullable: bool.true,
+			type: 'object' as const,
+			optional: true as const, nullable: true as const,
 			ref: 'User'
 		},
 		groupId: {
-			type: types.string,
-			optional: bool.false, nullable: bool.true,
+			type: 'string' as const,
+			optional: false as const, nullable: true as const,
 			format: 'id',
 		},
 		group: {
-			type: types.object,
-			optional: bool.true, nullable: bool.true,
+			type: 'object' as const,
+			optional: true as const, nullable: true as const,
 			ref: 'UserGroup'
 		},
 		isRead: {
-			type: types.boolean,
-			optional: bool.true, nullable: bool.false,
+			type: 'boolean' as const,
+			optional: true as const, nullable: false as const,
 		},
 		reads: {
-			type: types.array,
-			optional: bool.true, nullable: bool.false,
+			type: 'array' as const,
+			optional: true as const, nullable: false as const,
 			items: {
-				type: types.string,
-				optional: bool.false, nullable: bool.false,
+				type: 'string' as const,
+				optional: false as const, nullable: false as const,
 				format: 'id'
 			}
 		},
diff --git a/src/models/repositories/muting.ts b/src/models/repositories/muting.ts
index 9d99e08a7c..763e04bb3d 100644
--- a/src/models/repositories/muting.ts
+++ b/src/models/repositories/muting.ts
@@ -3,7 +3,7 @@ import { Users } from '..';
 import { Muting } from '../entities/muting';
 import { ensure } from '../../prelude/ensure';
 import { awaitAll } from '../../prelude/await-all';
-import { types, bool, SchemaType } from '../../misc/schema';
+import { SchemaType } from '../../misc/schema';
 
 export type PackedMuting = SchemaType<typeof packedMutingSchema>;
 
@@ -34,30 +34,30 @@ export class MutingRepository extends Repository<Muting> {
 }
 
 export const packedMutingSchema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		id: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 			description: 'The unique identifier for this muting.',
 			example: 'xxxxxxxxxx',
 		},
 		createdAt: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'date-time',
 			description: 'The date that the muting was created.'
 		},
 		muteeId: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 		},
 		mutee: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'User',
 			description: 'The mutee.'
 		},
diff --git a/src/models/repositories/note-favorite.ts b/src/models/repositories/note-favorite.ts
index 01064f3065..37cfbc0025 100644
--- a/src/models/repositories/note-favorite.ts
+++ b/src/models/repositories/note-favorite.ts
@@ -2,7 +2,6 @@ import { EntityRepository, Repository } from 'typeorm';
 import { NoteFavorite } from '../entities/note-favorite';
 import { Notes } from '..';
 import { ensure } from '../../prelude/ensure';
-import { types, bool } from '../../misc/schema';
 
 @EntityRepository(NoteFavorite)
 export class NoteFavoriteRepository extends Repository<NoteFavorite> {
@@ -29,30 +28,30 @@ export class NoteFavoriteRepository extends Repository<NoteFavorite> {
 }
 
 export const packedNoteFavoriteSchema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		id: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 			description: 'The unique identifier for this favorite.',
 			example: 'xxxxxxxxxx',
 		},
 		createdAt: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'date-time',
 			description: 'The date that the favorite was created.'
 		},
 		note: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		},
 		noteId: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 		},
 	},
diff --git a/src/models/repositories/note-reaction.ts b/src/models/repositories/note-reaction.ts
index 85e5b6b0a1..79b4989a20 100644
--- a/src/models/repositories/note-reaction.ts
+++ b/src/models/repositories/note-reaction.ts
@@ -2,7 +2,7 @@ import { EntityRepository, Repository } from 'typeorm';
 import { NoteReaction } from '../entities/note-reaction';
 import { Users } from '..';
 import { ensure } from '../../prelude/ensure';
-import { types, bool, SchemaType } from '../../misc/schema';
+import { SchemaType } from '../../misc/schema';
 
 export type PackedNoteReaction = SchemaType<typeof packedNoteReactionSchema>;
 
@@ -24,31 +24,31 @@ export class NoteReactionRepository extends Repository<NoteReaction> {
 }
 
 export const packedNoteReactionSchema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		id: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 			description: 'The unique identifier for this reaction.',
 			example: 'xxxxxxxxxx',
 		},
 		createdAt: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'date-time',
 			description: 'The date that the reaction was created.'
 		},
 		user: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'User',
 			description: 'User who performed this reaction.'
 		},
 		type: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			description: 'The reaction type.'
 		},
 	},
diff --git a/src/models/repositories/note.ts b/src/models/repositories/note.ts
index e5bf8d3f3a..3ac490b001 100644
--- a/src/models/repositories/note.ts
+++ b/src/models/repositories/note.ts
@@ -5,7 +5,7 @@ import { unique, concat } from '../../prelude/array';
 import { nyaize } from '../../misc/nyaize';
 import { Emojis, Users, Apps, PollVotes, DriveFiles, NoteReactions, Followings, Polls } from '..';
 import { ensure } from '../../prelude/ensure';
-import { SchemaType, types, bool } from '../../misc/schema';
+import { SchemaType } from '../../misc/schema';
 import { awaitAll } from '../../prelude/await-all';
 
 export type PackedNote = SchemaType<typeof packedNoteSchema>;
@@ -218,125 +218,125 @@ export class NoteRepository extends Repository<Note> {
 }
 
 export const packedNoteSchema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		id: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 			description: 'The unique identifier for this Note.',
 			example: 'xxxxxxxxxx',
 		},
 		createdAt: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'date-time',
 			description: 'The date that the Note was created on Misskey.'
 		},
 		text: {
-			type: types.string,
-			optional: bool.false, nullable: bool.true,
+			type: 'string' as const,
+			optional: false as const, nullable: true as const,
 		},
 		cw: {
-			type: types.string,
-			optional: bool.true, nullable: bool.true,
+			type: 'string' as const,
+			optional: true as const, nullable: true as const,
 		},
 		userId: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 		},
 		user: {
-			type: types.object,
+			type: 'object' as const,
 			ref: 'User',
-			optional: bool.false, nullable: bool.false,
+			optional: false as const, nullable: false as const,
 		},
 		replyId: {
-			type: types.string,
-			optional: bool.true, nullable: bool.true,
+			type: 'string' as const,
+			optional: true as const, nullable: true as const,
 			format: 'id',
 			example: 'xxxxxxxxxx',
 		},
 		renoteId: {
-			type: types.string,
-			optional: bool.true, nullable: bool.true,
+			type: 'string' as const,
+			optional: true as const, nullable: true as const,
 			format: 'id',
 			example: 'xxxxxxxxxx',
 		},
 		reply: {
-			type: types.object,
-			optional: bool.true, nullable: bool.true,
+			type: 'object' as const,
+			optional: true as const, nullable: true as const,
 			ref: 'Note'
 		},
 		renote: {
-			type: types.object,
-			optional: bool.true, nullable: bool.true,
+			type: 'object' as const,
+			optional: true as const, nullable: true as const,
 			ref: 'Note'
 		},
 		viaMobile: {
-			type: types.boolean,
-			optional: bool.true, nullable: bool.false,
+			type: 'boolean' as const,
+			optional: true as const, nullable: false as const,
 		},
 		isHidden: {
-			type: types.boolean,
-			optional: bool.true, nullable: bool.false,
+			type: 'boolean' as const,
+			optional: true as const, nullable: false as const,
 		},
 		visibility: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 		},
 		mentions: {
-			type: types.array,
-			optional: bool.true, nullable: bool.false,
+			type: 'array' as const,
+			optional: true as const, nullable: false as const,
 			items: {
-				type: types.string,
-				optional: bool.false, nullable: bool.false,
+				type: 'string' as const,
+				optional: false as const, nullable: false as const,
 				format: 'id'
 			}
 		},
 		visibleUserIds: {
-			type: types.array,
-			optional: bool.true, nullable: bool.false,
+			type: 'array' as const,
+			optional: true as const, nullable: false as const,
 			items: {
-				type: types.string,
-				optional: bool.false, nullable: bool.false,
+				type: 'string' as const,
+				optional: false as const, nullable: false as const,
 				format: 'id'
 			}
 		},
 		fileIds: {
-			type: types.array,
-			optional: bool.true, nullable: bool.false,
+			type: 'array' as const,
+			optional: true as const, nullable: false as const,
 			items: {
-				type: types.string,
-				optional: bool.false, nullable: bool.false,
+				type: 'string' as const,
+				optional: false as const, nullable: false as const,
 				format: 'id'
 			}
 		},
 		files: {
-			type: types.array,
-			optional: bool.true, nullable: bool.false,
+			type: 'array' as const,
+			optional: true as const, nullable: false as const,
 			items: {
-				type: types.object,
-				optional: bool.false, nullable: bool.false,
+				type: 'object' as const,
+				optional: false as const, nullable: false as const,
 				ref: 'DriveFile'
 			}
 		},
 		tags: {
-			type: types.array,
-			optional: bool.true, nullable: bool.false,
+			type: 'array' as const,
+			optional: true as const, nullable: false as const,
 			items: {
-				type: types.string,
-				optional: bool.false, nullable: bool.false,
+				type: 'string' as const,
+				optional: false as const, nullable: false as const,
 			}
 		},
 		poll: {
-			type: types.object,
-			optional: bool.true, nullable: bool.true,
+			type: 'object' as const,
+			optional: true as const, nullable: true as const,
 		},
 		geo: {
-			type: types.object,
-			optional: bool.true, nullable: bool.true,
+			type: 'object' as const,
+			optional: true as const, nullable: true as const,
 		},
 	},
 };
diff --git a/src/models/repositories/notification.ts b/src/models/repositories/notification.ts
index 54eec87cff..96293d4a68 100644
--- a/src/models/repositories/notification.ts
+++ b/src/models/repositories/notification.ts
@@ -3,7 +3,7 @@ import { Users, Notes } from '..';
 import { Notification } from '../entities/notification';
 import { ensure } from '../../prelude/ensure';
 import { awaitAll } from '../../prelude/await-all';
-import { types, bool, SchemaType } from '../../misc/schema';
+import { SchemaType } from '../../misc/schema';
 
 export type PackedNotification = SchemaType<typeof packedNotificationSchema>;
 
@@ -51,37 +51,37 @@ export class NotificationRepository extends Repository<Notification> {
 }
 
 export const packedNotificationSchema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		id: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 			description: 'The unique identifier for this notification.',
 			example: 'xxxxxxxxxx',
 		},
 		createdAt: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'date-time',
 			description: 'The date that the notification was created.'
 		},
 		type: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			enum: ['follow', 'receiveFollowRequest', 'mention', 'reply', 'renote', 'quote', 'reaction', 'pollVote'],
 			description: 'The type of the notification.'
 		},
 		userId: {
-			type: types.string,
-			optional: bool.true, nullable: bool.true,
+			type: 'string' as const,
+			optional: true as const, nullable: true as const,
 			format: 'id',
 		},
 		user: {
-			type: types.object,
+			type: 'object' as const,
 			ref: 'User',
-			optional: bool.true, nullable: bool.true,
+			optional: true as const, nullable: true as const,
 		},
 	}
 };
diff --git a/src/models/repositories/page.ts b/src/models/repositories/page.ts
index 3b41420025..33126274a1 100644
--- a/src/models/repositories/page.ts
+++ b/src/models/repositories/page.ts
@@ -1,6 +1,6 @@
 import { EntityRepository, Repository } from 'typeorm';
 import { Page } from '../entities/page';
-import { SchemaType, types, bool } from '../../misc/schema';
+import { SchemaType } from '../../misc/schema';
 import { Users, DriveFiles, PageLikes } from '..';
 import { awaitAll } from '../../prelude/await-all';
 import { DriveFile } from '../entities/drive-file';
@@ -89,54 +89,54 @@ export class PageRepository extends Repository<Page> {
 }
 
 export const packedPageSchema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		id: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 			example: 'xxxxxxxxxx',
 		},
 		createdAt: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'date-time',
 		},
 		updatedAt: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'date-time',
 		},
 		title: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 		},
 		name: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 		},
 		summary: {
-			type: types.string,
-			optional: bool.false, nullable: bool.true,
+			type: 'string' as const,
+			optional: false as const, nullable: true as const,
 		},
 		content: {
-			type: types.array,
-			optional: bool.false, nullable: bool.false,
+			type: 'array' as const,
+			optional: false as const, nullable: false as const,
 		},
 		variables: {
-			type: types.array,
-			optional: bool.false, nullable: bool.false,
+			type: 'array' as const,
+			optional: false as const, nullable: false as const,
 		},
 		userId: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 		},
 		user: {
-			type: types.object,
+			type: 'object' as const,
 			ref: 'User',
-			optional: bool.false, nullable: bool.false,
+			optional: false as const, nullable: false as const,
 		},
 	}
 };
diff --git a/src/models/repositories/user-group.ts b/src/models/repositories/user-group.ts
index 38174ce235..5ff75047c8 100644
--- a/src/models/repositories/user-group.ts
+++ b/src/models/repositories/user-group.ts
@@ -2,7 +2,7 @@ import { EntityRepository, Repository } from 'typeorm';
 import { UserGroup } from '../entities/user-group';
 import { ensure } from '../../prelude/ensure';
 import { UserGroupJoinings } from '..';
-import { bool, types, SchemaType } from '../../misc/schema';
+import { SchemaType } from '../../misc/schema';
 
 export type PackedUserGroup = SchemaType<typeof packedUserGroupSchema>;
 
@@ -28,38 +28,38 @@ export class UserGroupRepository extends Repository<UserGroup> {
 }
 
 export const packedUserGroupSchema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		id: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 			description: 'The unique identifier for this UserGroup.',
 			example: 'xxxxxxxxxx',
 		},
 		createdAt: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'date-time',
 			description: 'The date that the UserGroup was created.'
 		},
 		name: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			description: 'The name of the UserGroup.'
 		},
 		ownerId: {
-			type: types.string,
-			nullable: bool.false, optional: bool.false,
+			type: 'string' as const,
+			nullable: false as const, optional: false as const,
 			format: 'id',
 		},
 		userIds: {
-			type: types.array,
-			nullable: bool.false, optional: bool.true,
+			type: 'array' as const,
+			nullable: false as const, optional: true as const,
 			items: {
-				type: types.string,
-				nullable: bool.false, optional: bool.false,
+				type: 'string' as const,
+				nullable: false as const, optional: false as const,
 				format: 'id',
 			}
 		},
diff --git a/src/models/repositories/user-list.ts b/src/models/repositories/user-list.ts
index 54231c7f85..8842118be4 100644
--- a/src/models/repositories/user-list.ts
+++ b/src/models/repositories/user-list.ts
@@ -2,7 +2,7 @@ import { EntityRepository, Repository } from 'typeorm';
 import { UserList } from '../entities/user-list';
 import { ensure } from '../../prelude/ensure';
 import { UserListJoinings } from '..';
-import { bool, types, SchemaType } from '../../misc/schema';
+import { SchemaType } from '../../misc/schema';
 
 export type PackedUserList = SchemaType<typeof packedUserListSchema>;
 
@@ -27,33 +27,33 @@ export class UserListRepository extends Repository<UserList> {
 }
 
 export const packedUserListSchema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		id: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'id',
 			description: 'The unique identifier for this UserList.',
 			example: 'xxxxxxxxxx',
 		},
 		createdAt: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			format: 'date-time',
 			description: 'The date that the UserList was created.'
 		},
 		name: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 			description: 'The name of the UserList.'
 		},
 		userIds: {
-			type: types.array,
-			nullable: bool.false, optional: bool.true,
+			type: 'array' as const,
+			nullable: false as const, optional: true as const,
 			items: {
-				type: types.string,
-				nullable: bool.false, optional: bool.false,
+				type: 'string' as const,
+				nullable: false as const, optional: false as const,
 				format: 'id',
 			}
 		},
diff --git a/src/models/repositories/user.ts b/src/models/repositories/user.ts
index bd48f04ea3..5da7ee7832 100644
--- a/src/models/repositories/user.ts
+++ b/src/models/repositories/user.ts
@@ -4,7 +4,7 @@ import { User, ILocalUser, IRemoteUser } from '../entities/user';
 import { Emojis, Notes, NoteUnreads, FollowRequests, Notifications, MessagingMessages, UserNotePinings, Followings, Blockings, Mutings, UserProfiles, UserGroupJoinings } from '..';
 import { ensure } from '../../prelude/ensure';
 import config from '../../config';
-import { SchemaType, bool, types } from '../../misc/schema';
+import { SchemaType } from '../../misc/schema';
 import { awaitAll } from '../../prelude/await-all';
 
 export type PackedUser = SchemaType<typeof packedUserSchema>;
@@ -243,150 +243,150 @@ export class UserRepository extends Repository<User> {
 }
 
 export const packedUserSchema = {
-	type: types.object,
-	nullable: bool.false, optional: bool.false,
+	type: 'object' as const,
+	nullable: false as const, optional: false as const,
 	properties: {
 		id: {
-			type: types.string,
-			nullable: bool.false, optional: bool.false,
+			type: 'string' as const,
+			nullable: false as const, optional: false as const,
 			format: 'id',
 			description: 'The unique identifier for this User.',
 			example: 'xxxxxxxxxx',
 		},
 		username: {
-			type: types.string,
-			nullable: bool.false, optional: bool.false,
+			type: 'string' as const,
+			nullable: false as const, optional: false as const,
 			description: 'The screen name, handle, or alias that this user identifies themselves with.',
 			example: 'ai'
 		},
 		name: {
-			type: types.string,
-			nullable: bool.true, optional: bool.false,
+			type: 'string' as const,
+			nullable: true as const, optional: false as const,
 			description: 'The name of the user, as they’ve defined it.',
 			example: '藍'
 		},
 		url: {
-			type: types.string,
+			type: 'string' as const,
 			format: 'url',
-			nullable: bool.true, optional: bool.true,
+			nullable: true as const, optional: true as const,
 		},
 		avatarUrl: {
-			type: types.string,
+			type: 'string' as const,
 			format: 'url',
-			nullable: bool.true, optional: bool.false,
+			nullable: true as const, optional: false as const,
 		},
 		avatarColor: {
-			type: types.any,
-			nullable: bool.true, optional: bool.false,
+			type: 'any' as const,
+			nullable: true as const, optional: false as const,
 		},
 		bannerUrl: {
-			type: types.string,
+			type: 'string' as const,
 			format: 'url',
-			nullable: bool.true, optional: bool.true,
+			nullable: true as const, optional: true as const,
 		},
 		bannerColor: {
-			type: types.any,
-			nullable: bool.true, optional: bool.true,
+			type: 'any' as const,
+			nullable: true as const, optional: true as const,
 		},
 		emojis: {
-			type: types.any,
-			nullable: bool.true, optional: bool.false,
+			type: 'any' as const,
+			nullable: true as const, optional: false as const,
 		},
 		host: {
-			type: types.string,
-			nullable: bool.true, optional: bool.false,
+			type: 'string' as const,
+			nullable: true as const, optional: false as const,
 			example: 'misskey.example.com'
 		},
 		description: {
-			type: types.string,
-			nullable: bool.true, optional: bool.true,
+			type: 'string' as const,
+			nullable: true as const, optional: true as const,
 			description: 'The user-defined UTF-8 string describing their account.',
 			example: 'Hi masters, I am Ai!'
 		},
 		birthday: {
-			type: types.string,
-			nullable: bool.true, optional: bool.true,
+			type: 'string' as const,
+			nullable: true as const, optional: true as const,
 			example: '2018-03-12'
 		},
 		createdAt: {
-			type: types.string,
-			nullable: bool.false, optional: bool.true,
+			type: 'string' as const,
+			nullable: false as const, optional: true as const,
 			format: 'date-time',
 			description: 'The date that the user account was created on Misskey.'
 		},
 		updatedAt: {
-			type: types.string,
-			nullable: bool.true, optional: bool.true,
+			type: 'string' as const,
+			nullable: true as const, optional: true as const,
 			format: 'date-time',
 		},
 		location: {
-			type: types.string,
-			nullable: bool.true, optional: bool.true,
+			type: 'string' as const,
+			nullable: true as const, optional: true as const,
 		},
 		followersCount: {
-			type: types.number,
-			nullable: bool.false, optional: bool.true,
+			type: 'number' as const,
+			nullable: false as const, optional: true as const,
 			description: 'The number of followers this account currently has.'
 		},
 		followingCount: {
-			type: types.number,
-			nullable: bool.false, optional: bool.true,
+			type: 'number' as const,
+			nullable: false as const, optional: true as const,
 			description: 'The number of users this account is following.'
 		},
 		notesCount: {
-			type: types.number,
-			nullable: bool.false, optional: bool.true,
+			type: 'number' as const,
+			nullable: false as const, optional: true as const,
 			description: 'The number of Notes (including renotes) issued by the user.'
 		},
 		isBot: {
-			type: types.boolean,
-			nullable: bool.false, optional: bool.true,
+			type: 'boolean' as const,
+			nullable: false as const, optional: true as const,
 			description: 'Whether this account is a bot.'
 		},
 		pinnedNoteIds: {
-			type: types.array,
-			nullable: bool.false, optional: bool.true,
+			type: 'array' as const,
+			nullable: false as const, optional: true as const,
 			items: {
-				type: types.string,
-				nullable: bool.false, optional: bool.false,
+				type: 'string' as const,
+				nullable: false as const, optional: false as const,
 				format: 'id',
 			}
 		},
 		pinnedNotes: {
-			type: types.array,
-			nullable: bool.false, optional: bool.true,
+			type: 'array' as const,
+			nullable: false as const, optional: true as const,
 			items: {
-				type: types.object,
-				nullable: bool.false, optional: bool.false,
+				type: 'object' as const,
+				nullable: false as const, optional: false as const,
 				ref: 'Note'
 			}
 		},
 		isCat: {
-			type: types.boolean,
-			nullable: bool.false, optional: bool.true,
+			type: 'boolean' as const,
+			nullable: false as const, optional: true as const,
 			description: 'Whether this account is a cat.'
 		},
 		isAdmin: {
-			type: types.boolean,
-			nullable: bool.false, optional: bool.true,
+			type: 'boolean' as const,
+			nullable: false as const, optional: true as const,
 			description: 'Whether this account is the admin.'
 		},
 		isModerator: {
-			type: types.boolean,
-			nullable: bool.false, optional: bool.true,
+			type: 'boolean' as const,
+			nullable: false as const, optional: true as const,
 			description: 'Whether this account is a moderator.'
 		},
 		isLocked: {
-			type: types.boolean,
-			nullable: bool.false, optional: bool.true,
+			type: 'boolean' as const,
+			nullable: false as const, optional: true as const,
 		},
 		hasUnreadSpecifiedNotes: {
-			type: types.boolean,
-			nullable: bool.false, optional: bool.true,
+			type: 'boolean' as const,
+			nullable: false as const, optional: true as const,
 		},
 		hasUnreadMentions: {
-			type: types.boolean,
-			nullable: bool.false, optional: bool.true,
+			type: 'boolean' as const,
+			nullable: false as const, optional: true as const,
 		},
 	},
 };
diff --git a/src/server/api/endpoints/app/create.ts b/src/server/api/endpoints/app/create.ts
index 833d5060c5..81c851f3a3 100644
--- a/src/server/api/endpoints/app/create.ts
+++ b/src/server/api/endpoints/app/create.ts
@@ -4,7 +4,6 @@ import define from '../../define';
 import { Apps } from '../../../../models';
 import { genId } from '../../../../misc/gen-id';
 import { unique } from '../../../../prelude/array';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	tags: ['app'],
@@ -53,8 +52,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'App',
 	},
 };
diff --git a/src/server/api/endpoints/app/show.ts b/src/server/api/endpoints/app/show.ts
index e7d3e84388..2c8cdbe396 100644
--- a/src/server/api/endpoints/app/show.ts
+++ b/src/server/api/endpoints/app/show.ts
@@ -3,7 +3,6 @@ import { ID } from '../../../../misc/cafy-id';
 import define from '../../define';
 import { ApiError } from '../../error';
 import { Apps } from '../../../../models';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	tags: ['app'],
@@ -15,8 +14,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'App',
 	},
 
diff --git a/src/server/api/endpoints/auth/session/generate.ts b/src/server/api/endpoints/auth/session/generate.ts
index 9bf27c8e77..b38c275deb 100644
--- a/src/server/api/endpoints/auth/session/generate.ts
+++ b/src/server/api/endpoints/auth/session/generate.ts
@@ -5,7 +5,6 @@ import define from '../../../define';
 import { ApiError } from '../../../error';
 import { Apps, AuthSessions } from '../../../../../models';
 import { genId } from '../../../../../misc/gen-id';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	tags: ['auth'],
@@ -28,17 +27,17 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		properties: {
 			token: {
-				type: types.string,
-				optional: bool.false, nullable: bool.false,
+				type: 'string' as const,
+				optional: false as const, nullable: false as const,
 				description: 'セッションのトークン'
 			},
 			url: {
-				type: types.string,
-				optional: bool.false, nullable: bool.false,
+				type: 'string' as const,
+				optional: false as const, nullable: false as const,
 				format: 'url',
 				description: 'セッションのURL'
 			},
diff --git a/src/server/api/endpoints/auth/session/userkey.ts b/src/server/api/endpoints/auth/session/userkey.ts
index b7a58c4750..1dc78eeabd 100644
--- a/src/server/api/endpoints/auth/session/userkey.ts
+++ b/src/server/api/endpoints/auth/session/userkey.ts
@@ -3,7 +3,6 @@ import define from '../../../define';
 import { ApiError } from '../../../error';
 import { Apps, AuthSessions, AccessTokens, Users } from '../../../../../models';
 import { ensure } from '../../../../../prelude/ensure';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	tags: ['auth'],
@@ -29,18 +28,18 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		properties: {
 			accessToken: {
-				type: types.string,
-				optional: bool.false, nullable: bool.false,
+				type: 'string' as const,
+				optional: false as const, nullable: false as const,
 				description: 'ユーザーのアクセストークン',
 			},
 
 			user: {
-				type: types.object,
-				optional: bool.false, nullable: bool.false,
+				type: 'object' as const,
+				optional: false as const, nullable: false as const,
 				ref: 'User',
 				description: '認証したユーザー'
 			},
diff --git a/src/server/api/endpoints/blocking/list.ts b/src/server/api/endpoints/blocking/list.ts
index 5ff1dc0c49..c99ba09df0 100644
--- a/src/server/api/endpoints/blocking/list.ts
+++ b/src/server/api/endpoints/blocking/list.ts
@@ -3,7 +3,6 @@ import { ID } from '../../../../misc/cafy-id';
 import define from '../../define';
 import { Blockings } from '../../../../models';
 import { makePaginationQuery } from '../../common/make-pagination-query';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -33,11 +32,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Blocking',
 		}
 	},
diff --git a/src/server/api/endpoints/drive.ts b/src/server/api/endpoints/drive.ts
index 4d4516bd80..bb85bab148 100644
--- a/src/server/api/endpoints/drive.ts
+++ b/src/server/api/endpoints/drive.ts
@@ -1,7 +1,6 @@
 import define from '../define';
 import { fetchMeta } from '../../../misc/fetch-meta';
 import { DriveFiles } from '../../../models';
-import { types, bool } from '../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -16,16 +15,16 @@ export const meta = {
 	kind: 'read:drive',
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		properties: {
 			capacity: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 			},
 			usage: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 			}
 		}
 	}
diff --git a/src/server/api/endpoints/drive/files.ts b/src/server/api/endpoints/drive/files.ts
index d10c2a3ef4..77cefdfbe3 100644
--- a/src/server/api/endpoints/drive/files.ts
+++ b/src/server/api/endpoints/drive/files.ts
@@ -3,7 +3,6 @@ import { ID } from '../../../../misc/cafy-id';
 import define from '../../define';
 import { DriveFiles } from '../../../../models';
 import { makePaginationQuery } from '../../common/make-pagination-query';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -42,11 +41,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'DriveFile',
 		}
 	},
diff --git a/src/server/api/endpoints/drive/files/attached-notes.ts b/src/server/api/endpoints/drive/files/attached-notes.ts
index f770bc7136..2b84e114b3 100644
--- a/src/server/api/endpoints/drive/files/attached-notes.ts
+++ b/src/server/api/endpoints/drive/files/attached-notes.ts
@@ -3,7 +3,6 @@ import { ID } from '../../../../../misc/cafy-id';
 import define from '../../../define';
 import { ApiError } from '../../../error';
 import { DriveFiles, Notes } from '../../../../../models';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	stability: 'stable',
@@ -30,11 +29,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/drive/files/check-existence.ts b/src/server/api/endpoints/drive/files/check-existence.ts
index ab19566f1c..a6cd14caf2 100644
--- a/src/server/api/endpoints/drive/files/check-existence.ts
+++ b/src/server/api/endpoints/drive/files/check-existence.ts
@@ -1,7 +1,6 @@
 import $ from 'cafy';
 import define from '../../../define';
 import { DriveFiles } from '../../../../../models';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -25,8 +24,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.boolean,
-		optional: bool.false, nullable: bool.false,
+		type: 'boolean' as const,
+		optional: false as const, nullable: false as const,
 	},
 };
 
diff --git a/src/server/api/endpoints/drive/files/create.ts b/src/server/api/endpoints/drive/files/create.ts
index 0f81a1da99..664a2b87b2 100644
--- a/src/server/api/endpoints/drive/files/create.ts
+++ b/src/server/api/endpoints/drive/files/create.ts
@@ -6,7 +6,6 @@ import define from '../../../define';
 import { apiLogger } from '../../../logger';
 import { ApiError } from '../../../error';
 import { DriveFiles } from '../../../../../models';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -57,8 +56,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'DriveFile',
 	},
 
diff --git a/src/server/api/endpoints/drive/files/find-by-hash.ts b/src/server/api/endpoints/drive/files/find-by-hash.ts
index d56e63bc59..84cc4f92b1 100644
--- a/src/server/api/endpoints/drive/files/find-by-hash.ts
+++ b/src/server/api/endpoints/drive/files/find-by-hash.ts
@@ -1,7 +1,6 @@
 import $ from 'cafy';
 import define from '../../../define';
 import { DriveFiles } from '../../../../../models';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -24,11 +23,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'DriveFile',
 		}
 	},
diff --git a/src/server/api/endpoints/drive/files/find.ts b/src/server/api/endpoints/drive/files/find.ts
index 82b9a97b6d..732596a33f 100644
--- a/src/server/api/endpoints/drive/files/find.ts
+++ b/src/server/api/endpoints/drive/files/find.ts
@@ -2,7 +2,6 @@ import $ from 'cafy';
 import { ID } from '../../../../../misc/cafy-id';
 import define from '../../../define';
 import { DriveFiles } from '../../../../../models';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	requireCredential: true,
@@ -26,11 +25,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'DriveFile',
 		}
 	},
diff --git a/src/server/api/endpoints/drive/files/show.ts b/src/server/api/endpoints/drive/files/show.ts
index 8e74361f9c..4384b2114d 100644
--- a/src/server/api/endpoints/drive/files/show.ts
+++ b/src/server/api/endpoints/drive/files/show.ts
@@ -4,7 +4,6 @@ import define from '../../../define';
 import { ApiError } from '../../../error';
 import { DriveFile } from '../../../../../models/entities/drive-file';
 import { DriveFiles } from '../../../../../models';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	stability: 'stable',
@@ -39,8 +38,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'DriveFile',
 	},
 
diff --git a/src/server/api/endpoints/drive/folders.ts b/src/server/api/endpoints/drive/folders.ts
index dc3174cd2a..e2d22e7081 100644
--- a/src/server/api/endpoints/drive/folders.ts
+++ b/src/server/api/endpoints/drive/folders.ts
@@ -3,7 +3,6 @@ import { ID } from '../../../../misc/cafy-id';
 import define from '../../define';
 import { DriveFolders } from '../../../../models';
 import { makePaginationQuery } from '../../common/make-pagination-query';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -38,11 +37,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'DriveFolder',
 		}
 	},
diff --git a/src/server/api/endpoints/drive/folders/find.ts b/src/server/api/endpoints/drive/folders/find.ts
index 0368d026c3..04bec1b170 100644
--- a/src/server/api/endpoints/drive/folders/find.ts
+++ b/src/server/api/endpoints/drive/folders/find.ts
@@ -2,7 +2,6 @@ import $ from 'cafy';
 import { ID } from '../../../../../misc/cafy-id';
 import define from '../../../define';
 import { DriveFolders } from '../../../../../models';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	tags: ['drive'],
@@ -26,11 +25,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'DriveFolder',
 		}
 	},
diff --git a/src/server/api/endpoints/drive/folders/show.ts b/src/server/api/endpoints/drive/folders/show.ts
index a020b46aa9..f48f21d730 100644
--- a/src/server/api/endpoints/drive/folders/show.ts
+++ b/src/server/api/endpoints/drive/folders/show.ts
@@ -3,7 +3,6 @@ import { ID } from '../../../../../misc/cafy-id';
 import define from '../../../define';
 import { ApiError } from '../../../error';
 import { DriveFolders } from '../../../../../models';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	stability: 'stable',
@@ -30,8 +29,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'DriveFolder',
 	},
 
diff --git a/src/server/api/endpoints/drive/stream.ts b/src/server/api/endpoints/drive/stream.ts
index f75c4273c3..b93ee11a14 100644
--- a/src/server/api/endpoints/drive/stream.ts
+++ b/src/server/api/endpoints/drive/stream.ts
@@ -3,7 +3,6 @@ import { ID } from '../../../../misc/cafy-id';
 import define from '../../define';
 import { DriveFiles } from '../../../../models';
 import { makePaginationQuery } from '../../common/make-pagination-query';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	tags: ['drive'],
@@ -32,11 +31,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'DriveFile',
 		}
 	},
diff --git a/src/server/api/endpoints/hashtags/list.ts b/src/server/api/endpoints/hashtags/list.ts
index 9023f11913..9bc2677793 100644
--- a/src/server/api/endpoints/hashtags/list.ts
+++ b/src/server/api/endpoints/hashtags/list.ts
@@ -1,7 +1,6 @@
 import $ from 'cafy';
 import define from '../../define';
 import { Hashtags } from '../../../../models';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	tags: ['hashtags'],
@@ -48,11 +47,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Hashtag',
 		}
 	},
diff --git a/src/server/api/endpoints/hashtags/search.ts b/src/server/api/endpoints/hashtags/search.ts
index 0d2704d01c..7caaf34846 100644
--- a/src/server/api/endpoints/hashtags/search.ts
+++ b/src/server/api/endpoints/hashtags/search.ts
@@ -1,7 +1,6 @@
 import $ from 'cafy';
 import define from '../../define';
 import { Hashtags } from '../../../../models';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -38,11 +37,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.string,
-			optional: bool.false, nullable: bool.false,
+			type: 'string' as const,
+			optional: false as const, nullable: false as const,
 		}
 	},
 };
diff --git a/src/server/api/endpoints/hashtags/show.ts b/src/server/api/endpoints/hashtags/show.ts
index 72a4cc7c87..5de906fb1f 100644
--- a/src/server/api/endpoints/hashtags/show.ts
+++ b/src/server/api/endpoints/hashtags/show.ts
@@ -2,7 +2,6 @@ import $ from 'cafy';
 import define from '../../define';
 import { ApiError } from '../../error';
 import { Hashtags } from '../../../../models';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -24,8 +23,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'Hashtag',
 	},
 
diff --git a/src/server/api/endpoints/hashtags/trend.ts b/src/server/api/endpoints/hashtags/trend.ts
index 53a3514718..3154461e5a 100644
--- a/src/server/api/endpoints/hashtags/trend.ts
+++ b/src/server/api/endpoints/hashtags/trend.ts
@@ -2,7 +2,6 @@ import define from '../../define';
 import { fetchMeta } from '../../../../misc/fetch-meta';
 import { Notes } from '../../../../models';
 import { Note } from '../../../../models/entities/note';
-import { types, bool } from '../../../../misc/schema';
 
 /*
 トレンドに載るためには「『直近a分間のユニーク投稿数が今からa分前～今からb分前の間のユニーク投稿数のn倍以上』のハッシュタグの上位5位以内に入る」ことが必要
@@ -24,27 +23,27 @@ export const meta = {
 	requireCredential: false,
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: {
 				tag: {
-					type: types.string,
-					optional: bool.false, nullable: bool.false,
+					type: 'string' as const,
+					optional: false as const, nullable: false as const,
 				},
 				chart: {
-					type: types.array,
-					optional: bool.false, nullable: bool.false,
+					type: 'array' as const,
+					optional: false as const, nullable: false as const,
 					items: {
-						type: types.number,
-						optional: bool.false, nullable: bool.false,
+						type: 'number' as const,
+						optional: false as const, nullable: false as const,
 					}
 				},
 				usersCount: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 				}
 			}
 		}
diff --git a/src/server/api/endpoints/hashtags/users.ts b/src/server/api/endpoints/hashtags/users.ts
index b842f9de64..59210f4604 100644
--- a/src/server/api/endpoints/hashtags/users.ts
+++ b/src/server/api/endpoints/hashtags/users.ts
@@ -1,7 +1,6 @@
 import $ from 'cafy';
 import define from '../../define';
 import { Users } from '../../../../models';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	requireCredential: false,
@@ -48,11 +47,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'User',
 		}
 	},
diff --git a/src/server/api/endpoints/i.ts b/src/server/api/endpoints/i.ts
index 4ecd507e16..20a0c604f6 100644
--- a/src/server/api/endpoints/i.ts
+++ b/src/server/api/endpoints/i.ts
@@ -1,6 +1,5 @@
 import define from '../define';
 import { Users } from '../../../models';
-import { types, bool } from '../../../misc/schema';
 
 export const meta = {
 	stability: 'stable',
@@ -16,8 +15,8 @@ export const meta = {
 	params: {},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'User',
 	},
 };
diff --git a/src/server/api/endpoints/i/favorites.ts b/src/server/api/endpoints/i/favorites.ts
index d1e90dd15c..1bbc16256a 100644
--- a/src/server/api/endpoints/i/favorites.ts
+++ b/src/server/api/endpoints/i/favorites.ts
@@ -3,7 +3,6 @@ import { ID } from '../../../../misc/cafy-id';
 import define from '../../define';
 import { NoteFavorites } from '../../../../models';
 import { makePaginationQuery } from '../../common/make-pagination-query';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -33,11 +32,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'NoteFavorite',
 		}
 	},
diff --git a/src/server/api/endpoints/i/notifications.ts b/src/server/api/endpoints/i/notifications.ts
index 41513e5daa..aa72e9a176 100644
--- a/src/server/api/endpoints/i/notifications.ts
+++ b/src/server/api/endpoints/i/notifications.ts
@@ -4,7 +4,6 @@ import { readNotification } from '../../common/read-notification';
 import define from '../../define';
 import { makePaginationQuery } from '../../common/make-pagination-query';
 import { Notifications, Followings, Mutings } from '../../../../models';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -54,11 +53,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Notification',
 		}
 	},
diff --git a/src/server/api/endpoints/messaging/history.ts b/src/server/api/endpoints/messaging/history.ts
index 833ec37e4c..2c143c26b5 100644
--- a/src/server/api/endpoints/messaging/history.ts
+++ b/src/server/api/endpoints/messaging/history.ts
@@ -3,7 +3,6 @@ import define from '../../define';
 import { MessagingMessage } from '../../../../models/entities/messaging-message';
 import { MessagingMessages, Mutings, UserGroupJoinings } from '../../../../models';
 import { Brackets } from 'typeorm';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -30,11 +29,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'MessagingMessage',
 		}
 	},
diff --git a/src/server/api/endpoints/messaging/messages.ts b/src/server/api/endpoints/messaging/messages.ts
index ffd58c714e..b0b3e20d02 100644
--- a/src/server/api/endpoints/messaging/messages.ts
+++ b/src/server/api/endpoints/messaging/messages.ts
@@ -5,7 +5,6 @@ import { ApiError } from '../../error';
 import { getUser } from '../../common/getters';
 import { MessagingMessages, UserGroups, UserGroupJoinings } from '../../../../models';
 import { makePaginationQuery } from '../../common/make-pagination-query';
-import { types, bool } from '../../../../misc/schema';
 import { Brackets } from 'typeorm';
 import { readUserMessagingMessage, readGroupMessagingMessage } from '../../common/read-messaging-message';
 
@@ -58,11 +57,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'MessagingMessage',
 		}
 	},
diff --git a/src/server/api/endpoints/messaging/messages/create.ts b/src/server/api/endpoints/messaging/messages/create.ts
index feffc9a0c6..d0c1ee4941 100644
--- a/src/server/api/endpoints/messaging/messages/create.ts
+++ b/src/server/api/endpoints/messaging/messages/create.ts
@@ -9,7 +9,6 @@ import { getUser } from '../../../common/getters';
 import { MessagingMessages, DriveFiles, Mutings, UserGroups, UserGroupJoinings } from '../../../../../models';
 import { MessagingMessage } from '../../../../../models/entities/messaging-message';
 import { genId } from '../../../../../misc/gen-id';
-import { types, bool } from '../../../../../misc/schema';
 import { User } from '../../../../../models/entities/user';
 import { UserGroup } from '../../../../../models/entities/user-group';
 import { Not } from 'typeorm';
@@ -53,8 +52,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'MessagingMessage',
 	},
 
diff --git a/src/server/api/endpoints/meta.ts b/src/server/api/endpoints/meta.ts
index 1aa9a855dd..a3390a011d 100644
--- a/src/server/api/endpoints/meta.ts
+++ b/src/server/api/endpoints/meta.ts
@@ -5,7 +5,6 @@ import define from '../define';
 import { fetchMeta } from '../../../misc/fetch-meta';
 import * as pkg from '../../../../package.json';
 import { Emojis } from '../../../models';
-import { types, bool } from '../../../misc/schema';
 import { getConnection } from 'typeorm';
 import redis from '../../../db/redis';
 
@@ -29,40 +28,40 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		properties: {
 			version: {
-				type: types.string,
-				optional: bool.false, nullable: bool.false,
+				type: 'string' as const,
+				optional: false as const, nullable: false as const,
 				description: 'The version of Misskey of this instance.',
 				example: pkg.version
 			},
 			name: {
-				type: types.string,
-				optional: bool.false, nullable: bool.false,
+				type: 'string' as const,
+				optional: false as const, nullable: false as const,
 				description: 'The name of this instance.',
 			},
 			description: {
-				type: types.string,
-				optional: bool.false, nullable: bool.false,
+				type: 'string' as const,
+				optional: false as const, nullable: false as const,
 				description: 'The description of this instance.',
 			},
 			announcements: {
-				type: types.array,
-				optional: bool.false, nullable: bool.false,
+				type: 'array' as const,
+				optional: false as const, nullable: false as const,
 				items: {
-					type: types.object,
-					optional: bool.false, nullable: bool.false,
+					type: 'object' as const,
+					optional: false as const, nullable: false as const,
 					properties: {
 						title: {
-							type: types.string,
-							optional: bool.false, nullable: bool.false,
+							type: 'string' as const,
+							optional: false as const, nullable: false as const,
 							description: 'The title of the announcement.',
 						},
 						text: {
-							type: types.string,
-							optional: bool.false, nullable: bool.false,
+							type: 'string' as const,
+							optional: false as const, nullable: false as const,
 							description: 'The text of the announcement. (can be HTML)',
 						},
 					}
@@ -70,23 +69,23 @@ export const meta = {
 				description: 'The announcements of this instance.',
 			},
 			disableRegistration: {
-				type: types.boolean,
-				optional: bool.false, nullable: bool.false,
+				type: 'boolean' as const,
+				optional: false as const, nullable: false as const,
 				description: 'Whether disabled open registration.',
 			},
 			disableLocalTimeline: {
-				type: types.boolean,
-				optional: bool.false, nullable: bool.false,
+				type: 'boolean' as const,
+				optional: false as const, nullable: false as const,
 				description: 'Whether disabled LTL and STL.',
 			},
 			disableGlobalTimeline: {
-				type: types.boolean,
-				optional: bool.false, nullable: bool.false,
+				type: 'boolean' as const,
+				optional: false as const, nullable: false as const,
 				description: 'Whether disabled GTL.',
 			},
 			enableEmojiReaction: {
-				type: types.boolean,
-				optional: bool.false, nullable: bool.false,
+				type: 'boolean' as const,
+				optional: false as const, nullable: false as const,
 				description: 'Whether enabled emoji reaction.',
 			},
 		}
diff --git a/src/server/api/endpoints/mute/list.ts b/src/server/api/endpoints/mute/list.ts
index f9ea380c76..1afc120f5f 100644
--- a/src/server/api/endpoints/mute/list.ts
+++ b/src/server/api/endpoints/mute/list.ts
@@ -3,7 +3,6 @@ import { ID } from '../../../../misc/cafy-id';
 import define from '../../define';
 import { makePaginationQuery } from '../../common/make-pagination-query';
 import { Mutings } from '../../../../models';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -33,11 +32,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Muting',
 		}
 	},
diff --git a/src/server/api/endpoints/notes.ts b/src/server/api/endpoints/notes.ts
index 7aa19c9a2b..fab8455d78 100644
--- a/src/server/api/endpoints/notes.ts
+++ b/src/server/api/endpoints/notes.ts
@@ -3,7 +3,6 @@ import { ID } from '../../../misc/cafy-id';
 import define from '../define';
 import { makePaginationQuery } from '../common/make-pagination-query';
 import { Notes } from '../../../models';
-import { types, bool } from '../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -63,11 +62,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/notes/children.ts b/src/server/api/endpoints/notes/children.ts
index e8861eafa1..bc8407f31c 100644
--- a/src/server/api/endpoints/notes/children.ts
+++ b/src/server/api/endpoints/notes/children.ts
@@ -6,7 +6,6 @@ import { generateVisibilityQuery } from '../../common/generate-visibility-query'
 import { generateMuteQuery } from '../../common/generate-mute-query';
 import { Brackets } from 'typeorm';
 import { Notes } from '../../../../models';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -42,11 +41,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/notes/conversation.ts b/src/server/api/endpoints/notes/conversation.ts
index acd3ac75ef..245d427923 100644
--- a/src/server/api/endpoints/notes/conversation.ts
+++ b/src/server/api/endpoints/notes/conversation.ts
@@ -5,7 +5,6 @@ import { ApiError } from '../../error';
 import { getNote } from '../../common/getters';
 import { Note } from '../../../../models/entities/note';
 import { Notes } from '../../../../models';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -38,11 +37,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/notes/create.ts b/src/server/api/endpoints/notes/create.ts
index 46db274581..1650de9071 100644
--- a/src/server/api/endpoints/notes/create.ts
+++ b/src/server/api/endpoints/notes/create.ts
@@ -10,7 +10,6 @@ import { User } from '../../../../models/entities/user';
 import { Users, DriveFiles, Notes } from '../../../../models';
 import { DriveFile } from '../../../../models/entities/drive-file';
 import { Note } from '../../../../models/entities/note';
-import { types, bool } from '../../../../misc/schema';
 
 let maxNoteTextLength = 1000;
 
@@ -175,12 +174,12 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		properties: {
 			createdNote: {
-				type: types.object,
-				optional: bool.false, nullable: bool.false,
+				type: 'object' as const,
+				optional: false as const, nullable: false as const,
 				ref: 'Note',
 				description: '作成した投稿'
 			}
diff --git a/src/server/api/endpoints/notes/featured.ts b/src/server/api/endpoints/notes/featured.ts
index 64750815b0..0a1d8668b0 100644
--- a/src/server/api/endpoints/notes/featured.ts
+++ b/src/server/api/endpoints/notes/featured.ts
@@ -2,7 +2,6 @@ import $ from 'cafy';
 import define from '../../define';
 import { generateMuteQuery } from '../../common/generate-mute-query';
 import { Notes } from '../../../../models';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -25,11 +24,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/notes/global-timeline.ts b/src/server/api/endpoints/notes/global-timeline.ts
index f46fa208df..8654cf889a 100644
--- a/src/server/api/endpoints/notes/global-timeline.ts
+++ b/src/server/api/endpoints/notes/global-timeline.ts
@@ -7,7 +7,6 @@ import { makePaginationQuery } from '../../common/make-pagination-query';
 import { Notes } from '../../../../models';
 import { generateMuteQuery } from '../../common/generate-mute-query';
 import { activeUsersChart } from '../../../../services/chart';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -47,11 +46,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/notes/hybrid-timeline.ts b/src/server/api/endpoints/notes/hybrid-timeline.ts
index 7be13fc47f..8c4c7a60b9 100644
--- a/src/server/api/endpoints/notes/hybrid-timeline.ts
+++ b/src/server/api/endpoints/notes/hybrid-timeline.ts
@@ -9,7 +9,6 @@ import { Brackets } from 'typeorm';
 import { generateVisibilityQuery } from '../../common/generate-visibility-query';
 import { generateMuteQuery } from '../../common/generate-mute-query';
 import { activeUsersChart } from '../../../../services/chart';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -90,11 +89,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/notes/local-timeline.ts b/src/server/api/endpoints/notes/local-timeline.ts
index 73cbebace2..c688b9325e 100644
--- a/src/server/api/endpoints/notes/local-timeline.ts
+++ b/src/server/api/endpoints/notes/local-timeline.ts
@@ -9,7 +9,6 @@ import { makePaginationQuery } from '../../common/make-pagination-query';
 import { generateVisibilityQuery } from '../../common/generate-visibility-query';
 import { activeUsersChart } from '../../../../services/chart';
 import { Brackets } from 'typeorm';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -64,11 +63,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/notes/mentions.ts b/src/server/api/endpoints/notes/mentions.ts
index 02e44492ba..fd3767f632 100644
--- a/src/server/api/endpoints/notes/mentions.ts
+++ b/src/server/api/endpoints/notes/mentions.ts
@@ -7,7 +7,6 @@ import { generateVisibilityQuery } from '../../common/generate-visibility-query'
 import { generateMuteQuery } from '../../common/generate-mute-query';
 import { makePaginationQuery } from '../../common/make-pagination-query';
 import { Brackets } from 'typeorm';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -44,11 +43,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/notes/reactions.ts b/src/server/api/endpoints/notes/reactions.ts
index 0773b4faa2..7bea24d316 100644
--- a/src/server/api/endpoints/notes/reactions.ts
+++ b/src/server/api/endpoints/notes/reactions.ts
@@ -4,7 +4,6 @@ import define from '../../define';
 import { getNote } from '../../common/getters';
 import { ApiError } from '../../error';
 import { NoteReactions } from '../../../../models';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -45,11 +44,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'NoteReaction',
 		}
 	},
diff --git a/src/server/api/endpoints/notes/renotes.ts b/src/server/api/endpoints/notes/renotes.ts
index 00dfac3770..a5db706e32 100644
--- a/src/server/api/endpoints/notes/renotes.ts
+++ b/src/server/api/endpoints/notes/renotes.ts
@@ -7,7 +7,6 @@ import { generateVisibilityQuery } from '../../common/generate-visibility-query'
 import { generateMuteQuery } from '../../common/generate-mute-query';
 import { makePaginationQuery } from '../../common/make-pagination-query';
 import { Notes } from '../../../../models';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -43,11 +42,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/notes/replies.ts b/src/server/api/endpoints/notes/replies.ts
index 5fb0fd989f..cd38d41652 100644
--- a/src/server/api/endpoints/notes/replies.ts
+++ b/src/server/api/endpoints/notes/replies.ts
@@ -5,7 +5,6 @@ import { Notes } from '../../../../models';
 import { makePaginationQuery } from '../../common/make-pagination-query';
 import { generateVisibilityQuery } from '../../common/generate-visibility-query';
 import { generateMuteQuery } from '../../common/generate-mute-query';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -47,11 +46,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/notes/search-by-tag.ts b/src/server/api/endpoints/notes/search-by-tag.ts
index 0b49f896ad..7f53b26995 100644
--- a/src/server/api/endpoints/notes/search-by-tag.ts
+++ b/src/server/api/endpoints/notes/search-by-tag.ts
@@ -6,7 +6,6 @@ import { Notes } from '../../../../models';
 import { generateMuteQuery } from '../../common/generate-mute-query';
 import { generateVisibilityQuery } from '../../common/generate-visibility-query';
 import { Brackets } from 'typeorm';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -82,11 +81,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/notes/search.ts b/src/server/api/endpoints/notes/search.ts
index 65ce20074a..d3fb33c420 100644
--- a/src/server/api/endpoints/notes/search.ts
+++ b/src/server/api/endpoints/notes/search.ts
@@ -4,7 +4,6 @@ import define from '../../define';
 import { ApiError } from '../../error';
 import { Notes } from '../../../../models';
 import { In } from 'typeorm';
-import { types, bool } from '../../../../misc/schema';
 import { ID } from '../../../../misc/cafy-id';
 
 export const meta = {
@@ -44,11 +43,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/notes/show.ts b/src/server/api/endpoints/notes/show.ts
index 54b420813d..75abbae55f 100644
--- a/src/server/api/endpoints/notes/show.ts
+++ b/src/server/api/endpoints/notes/show.ts
@@ -4,7 +4,6 @@ import define from '../../define';
 import { getNote } from '../../common/getters';
 import { ApiError } from '../../error';
 import { Notes } from '../../../../models';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	stability: 'stable',
@@ -29,8 +28,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'Note',
 	},
 
diff --git a/src/server/api/endpoints/notes/timeline.ts b/src/server/api/endpoints/notes/timeline.ts
index f9442f8b90..25876f655a 100644
--- a/src/server/api/endpoints/notes/timeline.ts
+++ b/src/server/api/endpoints/notes/timeline.ts
@@ -7,7 +7,6 @@ import { generateVisibilityQuery } from '../../common/generate-visibility-query'
 import { generateMuteQuery } from '../../common/generate-mute-query';
 import { activeUsersChart } from '../../../../services/chart';
 import { Brackets } from 'typeorm';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -89,11 +88,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/notes/user-list-timeline.ts b/src/server/api/endpoints/notes/user-list-timeline.ts
index c16018d434..f66221537d 100644
--- a/src/server/api/endpoints/notes/user-list-timeline.ts
+++ b/src/server/api/endpoints/notes/user-list-timeline.ts
@@ -6,7 +6,6 @@ import { UserLists, UserListJoinings, Notes } from '../../../../models';
 import { makePaginationQuery } from '../../common/make-pagination-query';
 import { generateVisibilityQuery } from '../../common/generate-visibility-query';
 import { activeUsersChart } from '../../../../services/chart';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -95,11 +94,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/pages/create.ts b/src/server/api/endpoints/pages/create.ts
index e6b813648b..ffe0d38ea6 100644
--- a/src/server/api/endpoints/pages/create.ts
+++ b/src/server/api/endpoints/pages/create.ts
@@ -2,7 +2,6 @@ import $ from 'cafy';
 import * as ms from 'ms';
 import define from '../../define';
 import { ID } from '../../../../misc/cafy-id';
-import { types, bool } from '../../../../misc/schema';
 import { Pages, DriveFiles } from '../../../../models';
 import { genId } from '../../../../misc/gen-id';
 import { Page } from '../../../../models/entities/page';
@@ -61,8 +60,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'Page',
 	},
 
diff --git a/src/server/api/endpoints/pages/show.ts b/src/server/api/endpoints/pages/show.ts
index e3d6e6a15f..84808418f3 100644
--- a/src/server/api/endpoints/pages/show.ts
+++ b/src/server/api/endpoints/pages/show.ts
@@ -2,7 +2,6 @@ import $ from 'cafy';
 import define from '../../define';
 import { ApiError } from '../../error';
 import { Pages, Users } from '../../../../models';
-import { types, bool } from '../../../../misc/schema';
 import { ID } from '../../../../misc/cafy-id';
 import { Page } from '../../../../models/entities/page';
 
@@ -34,8 +33,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'Page',
 	},
 
diff --git a/src/server/api/endpoints/pinned-users.ts b/src/server/api/endpoints/pinned-users.ts
index de0e17a2ec..853e1cd4b8 100644
--- a/src/server/api/endpoints/pinned-users.ts
+++ b/src/server/api/endpoints/pinned-users.ts
@@ -1,6 +1,5 @@
 import define from '../define';
 import { Users } from '../../../models';
-import { types, bool } from '../../../misc/schema';
 import { fetchMeta } from '../../../misc/fetch-meta';
 import parseAcct from '../../../misc/acct/parse';
 import { User } from '../../../models/entities/user';
@@ -14,11 +13,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'User',
 		}
 	},
diff --git a/src/server/api/endpoints/stats.ts b/src/server/api/endpoints/stats.ts
index 4dca62445f..c86d893d5e 100644
--- a/src/server/api/endpoints/stats.ts
+++ b/src/server/api/endpoints/stats.ts
@@ -1,7 +1,6 @@
 import define from '../define';
 import { Notes, Users } from '../../../models';
 import { federationChart, driveChart } from '../../../services/chart';
-import { bool, types } from '../../../misc/schema';
 
 export const meta = {
 	requireCredential: false,
@@ -16,32 +15,32 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		properties: {
 			notesCount: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 				description: 'The count of all (local/remote) notes of this instance.',
 			},
 			originalNotesCount: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 				description: 'The count of all local notes of this instance.',
 			},
 			usersCount: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 				description: 'The count of all (local/remote) accounts of this instance.',
 			},
 			originalUsersCount: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 				description: 'The count of all local accounts of this instance.',
 			},
 			instances: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 				description: 'The count of federated instances.',
 			},
 		}
diff --git a/src/server/api/endpoints/users.ts b/src/server/api/endpoints/users.ts
index 539f2ef897..93cf01a6f8 100644
--- a/src/server/api/endpoints/users.ts
+++ b/src/server/api/endpoints/users.ts
@@ -2,7 +2,6 @@ import $ from 'cafy';
 import define from '../define';
 import { Users } from '../../../models';
 import { generateMuteQueryForUsers } from '../common/generate-mute-query';
-import { types, bool } from '../../../misc/schema';
 
 export const meta = {
 	tags: ['users'],
@@ -53,11 +52,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'User',
 		}
 	},
diff --git a/src/server/api/endpoints/users/followers.ts b/src/server/api/endpoints/users/followers.ts
index 465b71e2e6..68c32fe983 100644
--- a/src/server/api/endpoints/users/followers.ts
+++ b/src/server/api/endpoints/users/followers.ts
@@ -5,7 +5,6 @@ import { ApiError } from '../../error';
 import { Users, Followings } from '../../../../models';
 import { makePaginationQuery } from '../../common/make-pagination-query';
 import { toPunyNullable } from '../../../../misc/convert-host';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -49,11 +48,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Following',
 		}
 	},
diff --git a/src/server/api/endpoints/users/following.ts b/src/server/api/endpoints/users/following.ts
index 2a7748ac64..eb699b2903 100644
--- a/src/server/api/endpoints/users/following.ts
+++ b/src/server/api/endpoints/users/following.ts
@@ -5,7 +5,6 @@ import { ApiError } from '../../error';
 import { Users, Followings } from '../../../../models';
 import { makePaginationQuery } from '../../common/make-pagination-query';
 import { toPunyNullable } from '../../../../misc/convert-host';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -49,11 +48,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Following',
 		}
 	},
diff --git a/src/server/api/endpoints/users/get-frequently-replied-users.ts b/src/server/api/endpoints/users/get-frequently-replied-users.ts
index 24d1bd194c..1a17b488f0 100644
--- a/src/server/api/endpoints/users/get-frequently-replied-users.ts
+++ b/src/server/api/endpoints/users/get-frequently-replied-users.ts
@@ -6,7 +6,6 @@ import { ApiError } from '../../error';
 import { getUser } from '../../common/getters';
 import { Not, In, IsNull } from 'typeorm';
 import { Notes, Users } from '../../../../models';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	tags: ['users'],
@@ -29,11 +28,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'User',
 		}
 	},
diff --git a/src/server/api/endpoints/users/groups/create.ts b/src/server/api/endpoints/users/groups/create.ts
index ee6cade8d0..2a6e5135e5 100644
--- a/src/server/api/endpoints/users/groups/create.ts
+++ b/src/server/api/endpoints/users/groups/create.ts
@@ -3,7 +3,6 @@ import define from '../../../define';
 import { UserGroups, UserGroupJoinings } from '../../../../../models';
 import { genId } from '../../../../../misc/gen-id';
 import { UserGroup } from '../../../../../models/entities/user-group';
-import { types, bool } from '../../../../../misc/schema';
 import { UserGroupJoining } from '../../../../../models/entities/user-group-joining';
 
 export const meta = {
@@ -25,8 +24,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'UserGroup',
 	},
 };
diff --git a/src/server/api/endpoints/users/groups/joined.ts b/src/server/api/endpoints/users/groups/joined.ts
index 97d168e527..c60ba57c09 100644
--- a/src/server/api/endpoints/users/groups/joined.ts
+++ b/src/server/api/endpoints/users/groups/joined.ts
@@ -1,6 +1,5 @@
 import define from '../../../define';
 import { UserGroups, UserGroupJoinings } from '../../../../../models';
-import { types, bool } from '../../../../../misc/schema';
 import { Not, In } from 'typeorm';
 
 export const meta = {
@@ -15,11 +14,11 @@ export const meta = {
 	kind: 'read:user-groups',
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'UserGroup',
 		}
 	},
diff --git a/src/server/api/endpoints/users/groups/owned.ts b/src/server/api/endpoints/users/groups/owned.ts
index 6cf39a142b..e2c0bf2fc1 100644
--- a/src/server/api/endpoints/users/groups/owned.ts
+++ b/src/server/api/endpoints/users/groups/owned.ts
@@ -1,6 +1,5 @@
 import define from '../../../define';
 import { UserGroups } from '../../../../../models';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -14,11 +13,11 @@ export const meta = {
 	kind: 'read:user-groups',
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'UserGroup',
 		}
 	},
diff --git a/src/server/api/endpoints/users/groups/show.ts b/src/server/api/endpoints/users/groups/show.ts
index 4f8374a222..643f1acf7a 100644
--- a/src/server/api/endpoints/users/groups/show.ts
+++ b/src/server/api/endpoints/users/groups/show.ts
@@ -3,7 +3,6 @@ import { ID } from '../../../../../misc/cafy-id';
 import define from '../../../define';
 import { ApiError } from '../../../error';
 import { UserGroups, UserGroupJoinings } from '../../../../../models';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -24,8 +23,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'UserGroup',
 	},
 
diff --git a/src/server/api/endpoints/users/groups/transfer.ts b/src/server/api/endpoints/users/groups/transfer.ts
index b4284ab484..012f9f4ef3 100644
--- a/src/server/api/endpoints/users/groups/transfer.ts
+++ b/src/server/api/endpoints/users/groups/transfer.ts
@@ -4,7 +4,6 @@ import define from '../../../define';
 import { ApiError } from '../../../error';
 import { getUser } from '../../../common/getters';
 import { UserGroups, UserGroupJoinings } from '../../../../../models';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -33,8 +32,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'UserGroup',
 	},
 
diff --git a/src/server/api/endpoints/users/groups/update.ts b/src/server/api/endpoints/users/groups/update.ts
index bc974621a3..2fc0a803a1 100644
--- a/src/server/api/endpoints/users/groups/update.ts
+++ b/src/server/api/endpoints/users/groups/update.ts
@@ -3,7 +3,6 @@ import { ID } from '../../../../../misc/cafy-id';
 import define from '../../../define';
 import { ApiError } from '../../../error';
 import { UserGroups } from '../../../../../models';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -36,8 +35,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'UserGroup',
 	},
 
diff --git a/src/server/api/endpoints/users/lists/create.ts b/src/server/api/endpoints/users/lists/create.ts
index 79efffbf9e..28af3c8d86 100644
--- a/src/server/api/endpoints/users/lists/create.ts
+++ b/src/server/api/endpoints/users/lists/create.ts
@@ -3,7 +3,6 @@ import define from '../../../define';
 import { UserLists } from '../../../../../models';
 import { genId } from '../../../../../misc/gen-id';
 import { UserList } from '../../../../../models/entities/user-list';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -24,8 +23,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'UserList',
 	},
 };
diff --git a/src/server/api/endpoints/users/lists/list.ts b/src/server/api/endpoints/users/lists/list.ts
index 684086b5c6..7b89d34314 100644
--- a/src/server/api/endpoints/users/lists/list.ts
+++ b/src/server/api/endpoints/users/lists/list.ts
@@ -1,6 +1,5 @@
 import define from '../../../define';
 import { UserLists } from '../../../../../models';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -14,11 +13,11 @@ export const meta = {
 	kind: 'read:account',
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'UserList',
 		}
 	},
diff --git a/src/server/api/endpoints/users/lists/show.ts b/src/server/api/endpoints/users/lists/show.ts
index 395f9352d4..01d03d1bfb 100644
--- a/src/server/api/endpoints/users/lists/show.ts
+++ b/src/server/api/endpoints/users/lists/show.ts
@@ -3,7 +3,6 @@ import { ID } from '../../../../../misc/cafy-id';
 import define from '../../../define';
 import { ApiError } from '../../../error';
 import { UserLists } from '../../../../../models';
-import { types, bool } from '../../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -24,8 +23,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'UserList',
 	},
 
diff --git a/src/server/api/endpoints/users/notes.ts b/src/server/api/endpoints/users/notes.ts
index fdc50e4dae..ef564b3c34 100644
--- a/src/server/api/endpoints/users/notes.ts
+++ b/src/server/api/endpoints/users/notes.ts
@@ -8,7 +8,6 @@ import { generateVisibilityQuery } from '../../common/generate-visibility-query'
 import { Notes } from '../../../../models';
 import { generateMuteQuery } from '../../common/generate-mute-query';
 import { Brackets } from 'typeorm';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -120,11 +119,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'Note',
 		}
 	},
diff --git a/src/server/api/endpoints/users/recommendation.ts b/src/server/api/endpoints/users/recommendation.ts
index 38b420c332..73d8fe6208 100644
--- a/src/server/api/endpoints/users/recommendation.ts
+++ b/src/server/api/endpoints/users/recommendation.ts
@@ -3,7 +3,6 @@ import $ from 'cafy';
 import define from '../../define';
 import { Users, Followings } from '../../../../models';
 import { generateMuteQueryForUsers } from '../../common/generate-mute-query';
-import { types, bool } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -29,11 +28,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'User',
 		}
 	},
diff --git a/src/server/api/endpoints/users/search.ts b/src/server/api/endpoints/users/search.ts
index 5c413defbc..9aa9e398e3 100644
--- a/src/server/api/endpoints/users/search.ts
+++ b/src/server/api/endpoints/users/search.ts
@@ -2,7 +2,6 @@ import $ from 'cafy';
 import define from '../../define';
 import { Users } from '../../../../models';
 import { User } from '../../../../models/entities/user';
-import { bool, types } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -55,11 +54,11 @@ export const meta = {
 	},
 
 	res: {
-		type: types.array,
-		optional: bool.false, nullable: bool.false,
+		type: 'array' as const,
+		optional: false as const, nullable: false as const,
 		items: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			ref: 'User',
 		}
 	},
diff --git a/src/server/api/endpoints/users/show.ts b/src/server/api/endpoints/users/show.ts
index 820c44e81b..30660aed3a 100644
--- a/src/server/api/endpoints/users/show.ts
+++ b/src/server/api/endpoints/users/show.ts
@@ -6,7 +6,6 @@ import { ApiError } from '../../error';
 import { ID } from '../../../../misc/cafy-id';
 import { Users } from '../../../../models';
 import { In } from 'typeorm';
-import { bool, types } from '../../../../misc/schema';
 
 export const meta = {
 	desc: {
@@ -43,8 +42,8 @@ export const meta = {
 	},
 
 	res: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		ref: 'User',
 	},
 
diff --git a/src/services/chart/charts/schemas/active-users.ts b/src/services/chart/charts/schemas/active-users.ts
index f10393bc36..6e26bb4698 100644
--- a/src/services/chart/charts/schemas/active-users.ts
+++ b/src/services/chart/charts/schemas/active-users.ts
@@ -1,12 +1,10 @@
-import { types, bool } from '../../../../misc/schema';
-
 export const logSchema = {
 	/**
 	 * アクティブユーザー数
 	 */
 	count: {
-		type: types.number,
-		optional: bool.false, nullable: bool.false,
+		type: 'number' as const,
+		optional: false as const, nullable: false as const,
 		description: 'アクティブユーザー数',
 	},
 };
@@ -15,17 +13,17 @@ export const logSchema = {
  * アクティブユーザーに関するチャート
  */
 export const schema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		local: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: logSchema
 		},
 		remote: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: logSchema
 		},
 	}
diff --git a/src/services/chart/charts/schemas/drive.ts b/src/services/chart/charts/schemas/drive.ts
index 3327950635..dcc50df8cf 100644
--- a/src/services/chart/charts/schemas/drive.ts
+++ b/src/services/chart/charts/schemas/drive.ts
@@ -1,12 +1,10 @@
-import { types, bool } from '../../../../misc/schema';
-
 const logSchema = {
 	/**
 	 * 集計期間時点での、全ドライブファイル数
 	 */
 	totalCount: {
-		type: types.number,
-		optional: bool.false, nullable: bool.false,
+		type: 'number' as const,
+		optional: false as const, nullable: false as const,
 		description: '集計期間時点での、全ドライブファイル数'
 	},
 
@@ -14,8 +12,8 @@ const logSchema = {
 	 * 集計期間時点での、全ドライブファイルの合計サイズ
 	 */
 	totalSize: {
-		type: types.number,
-		optional: bool.false, nullable: bool.false,
+		type: 'number' as const,
+		optional: false as const, nullable: false as const,
 		description: '集計期間時点での、全ドライブファイルの合計サイズ'
 	},
 
@@ -23,8 +21,8 @@ const logSchema = {
 	 * 増加したドライブファイル数
 	 */
 	incCount: {
-		type: types.number,
-		optional: bool.false, nullable: bool.false,
+		type: 'number' as const,
+		optional: false as const, nullable: false as const,
 		description: '増加したドライブファイル数'
 	},
 
@@ -32,8 +30,8 @@ const logSchema = {
 	 * 増加したドライブ使用量
 	 */
 	incSize: {
-		type: types.number,
-		optional: bool.false, nullable: bool.false,
+		type: 'number' as const,
+		optional: false as const, nullable: false as const,
 		description: '増加したドライブ使用量'
 	},
 
@@ -41,8 +39,8 @@ const logSchema = {
 	 * 減少したドライブファイル数
 	 */
 	decCount: {
-		type: types.number,
-		optional: bool.false, nullable: bool.false,
+		type: 'number' as const,
+		optional: false as const, nullable: false as const,
 		description: '減少したドライブファイル数'
 	},
 
@@ -50,24 +48,24 @@ const logSchema = {
 	 * 減少したドライブ使用量
 	 */
 	decSize: {
-		type: types.number,
-		optional: bool.false, nullable: bool.false,
+		type: 'number' as const,
+		optional: false as const, nullable: false as const,
 		description: '減少したドライブ使用量'
 	},
 };
 
 export const schema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		local: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: logSchema
 		},
 		remote: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: logSchema
 		},
 	}
diff --git a/src/services/chart/charts/schemas/federation.ts b/src/services/chart/charts/schemas/federation.ts
index 41ae977cbd..2f2d22c0d3 100644
--- a/src/services/chart/charts/schemas/federation.ts
+++ b/src/services/chart/charts/schemas/federation.ts
@@ -1,29 +1,27 @@
-import { types, bool } from '../../../../misc/schema';
-
 /**
  * フェデレーションに関するチャート
  */
 export const schema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		instance: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: {
 				total: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: 'インスタンス数の合計'
 				},
 				inc: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '増加インスタンス数'
 				},
 				dec: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '減少インスタンス数'
 				},
 			}
diff --git a/src/services/chart/charts/schemas/hashtag.ts b/src/services/chart/charts/schemas/hashtag.ts
index 918242f66e..4dfd61c97f 100644
--- a/src/services/chart/charts/schemas/hashtag.ts
+++ b/src/services/chart/charts/schemas/hashtag.ts
@@ -1,12 +1,10 @@
-import { types, bool } from '../../../../misc/schema';
-
 export const logSchema = {
 	/**
 	 * 投稿された数
 	 */
 	count: {
-		type: types.number,
-		optional: bool.false, nullable: bool.false,
+		type: 'number' as const,
+		optional: false as const, nullable: false as const,
 		description: '投稿された数',
 	},
 };
@@ -15,17 +13,17 @@ export const logSchema = {
  * ハッシュタグに関するチャート
  */
 export const schema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		local: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: logSchema
 		},
 		remote: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: logSchema
 		},
 	}
diff --git a/src/services/chart/charts/schemas/instance.ts b/src/services/chart/charts/schemas/instance.ts
index d97f49ea72..d2152a4ae7 100644
--- a/src/services/chart/charts/schemas/instance.ts
+++ b/src/services/chart/charts/schemas/instance.ts
@@ -1,73 +1,71 @@
-import { types, bool } from '../../../../misc/schema';
-
 /**
  * インスタンスごとのチャート
  */
 export const schema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		requests: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: {
 				failed: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '失敗したリクエスト数'
 				},
 				succeeded: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '成功したリクエスト数'
 				},
 				received: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '受信したリクエスト数'
 				},
 			}
 		},
 
 		notes: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: {
 				total: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '集計期間時点での、全投稿数'
 				},
 				inc: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '増加した投稿数'
 				},
 				dec: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '減少した投稿数'
 				},
 
 				diffs: {
-					type: types.object,
-					optional: bool.false, nullable: bool.false,
+					type: 'object' as const,
+					optional: false as const, nullable: false as const,
 					properties: {
 						normal: {
-							type: types.number,
-							optional: bool.false, nullable: bool.false,
+							type: 'number' as const,
+							optional: false as const, nullable: false as const,
 							description: '通常の投稿数の差分'
 						},
 
 						reply: {
-							type: types.number,
-							optional: bool.false, nullable: bool.false,
+							type: 'number' as const,
+							optional: false as const, nullable: false as const,
 							description: 'リプライの投稿数の差分'
 						},
 
 						renote: {
-							type: types.number,
-							optional: bool.false, nullable: bool.false,
+							type: 'number' as const,
+							optional: false as const, nullable: false as const,
 							description: 'Renoteの投稿数の差分'
 						},
 					}
@@ -76,103 +74,103 @@ export const schema = {
 		},
 
 		users: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: {
 				total: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '集計期間時点での、全ユーザー数'
 				},
 				inc: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '増加したユーザー数'
 				},
 				dec: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '減少したユーザー数'
 				},
 			}
 		},
 
 		following: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: {
 				total: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '集計期間時点での、全フォロー数'
 				},
 				inc: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '増加したフォロー数'
 				},
 				dec: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '減少したフォロー数'
 				},
 			}
 		},
 
 		followers: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: {
 				total: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '集計期間時点での、全フォロワー数'
 				},
 				inc: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '増加したフォロワー数'
 				},
 				dec: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '減少したフォロワー数'
 				},
 			}
 		},
 
 		drive: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: {
 				totalFiles: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '集計期間時点での、全ドライブファイル数'
 				},
 				totalUsage: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '集計期間時点での、全ドライブファイルの合計サイズ'
 				},
 				incFiles: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '増加したドライブファイル数'
 				},
 				incUsage: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '増加したドライブ使用量'
 				},
 				decFiles: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '減少したドライブファイル数'
 				},
 				decUsage: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '減少したドライブ使用量'
 				},
 			}
diff --git a/src/services/chart/charts/schemas/network.ts b/src/services/chart/charts/schemas/network.ts
index 819e2a145e..30123c5d90 100644
--- a/src/services/chart/charts/schemas/network.ts
+++ b/src/services/chart/charts/schemas/network.ts
@@ -1,35 +1,33 @@
-import { types, bool } from '../../../../misc/schema';
-
 /**
  * ネットワークに関するチャート
  */
 export const schema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		incomingRequests: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: '受信したリクエスト数'
 		},
 		outgoingRequests: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: '送信したリクエスト数'
 		},
 		totalTime: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: '応答時間の合計' // TIP: (totalTime / incomingRequests) でひとつのリクエストに平均でどれくらいの時間がかかったか知れる
 		},
 		incomingBytes: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: '合計受信データ量'
 		},
 		outgoingBytes: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: '合計送信データ量'
 		},
 	}
diff --git a/src/services/chart/charts/schemas/notes.ts b/src/services/chart/charts/schemas/notes.ts
index aabe49edd9..6dbf321b7c 100644
--- a/src/services/chart/charts/schemas/notes.ts
+++ b/src/services/chart/charts/schemas/notes.ts
@@ -1,43 +1,41 @@
-import { types, bool } from '../../../../misc/schema';
-
 const logSchema = {
 	total: {
-		type: types.number,
-		optional: bool.false, nullable: bool.false,
+		type: 'number' as const,
+		optional: false as const, nullable: false as const,
 		description: '集計期間時点での、全投稿数'
 	},
 
 	inc: {
-		type: types.number,
-		optional: bool.false, nullable: bool.false,
+		type: 'number' as const,
+		optional: false as const, nullable: false as const,
 		description: '増加した投稿数'
 	},
 
 	dec: {
-		type: types.number,
-		optional: bool.false, nullable: bool.false,
+		type: 'number' as const,
+		optional: false as const, nullable: false as const,
 		description: '減少した投稿数'
 	},
 
 	diffs: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		properties: {
 			normal: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 				description: '通常の投稿数の差分'
 			},
 
 			reply: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 				description: 'リプライの投稿数の差分'
 			},
 
 			renote: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 				description: 'Renoteの投稿数の差分'
 			},
 		}
@@ -45,17 +43,17 @@ const logSchema = {
 };
 
 export const schema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		local: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: logSchema
 		},
 		remote: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: logSchema
 		},
 	}
diff --git a/src/services/chart/charts/schemas/per-user-drive.ts b/src/services/chart/charts/schemas/per-user-drive.ts
index 62e7795167..21312e82d8 100644
--- a/src/services/chart/charts/schemas/per-user-drive.ts
+++ b/src/services/chart/charts/schemas/per-user-drive.ts
@@ -1,15 +1,13 @@
-import { types, bool } from '../../../../misc/schema';
-
 export const schema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		/**
 		 * 集計期間時点での、全ドライブファイル数
 		 */
 		totalCount: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: '集計期間時点での、全ドライブファイル数'
 		},
 
@@ -17,8 +15,8 @@ export const schema = {
 		 * 集計期間時点での、全ドライブファイルの合計サイズ
 		 */
 		totalSize: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: '集計期間時点での、全ドライブファイルの合計サイズ'
 		},
 
@@ -26,8 +24,8 @@ export const schema = {
 		 * 増加したドライブファイル数
 		 */
 		incCount: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: '増加したドライブファイル数'
 		},
 
@@ -35,8 +33,8 @@ export const schema = {
 		 * 増加したドライブ使用量
 		 */
 		incSize: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: '増加したドライブ使用量'
 		},
 
@@ -44,8 +42,8 @@ export const schema = {
 		 * 減少したドライブファイル数
 		 */
 		decCount: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: '減少したドライブファイル数'
 		},
 
@@ -53,8 +51,8 @@ export const schema = {
 		 * 減少したドライブ使用量
 		 */
 		decSize: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: '減少したドライブ使用量'
 		},
 	}
diff --git a/src/services/chart/charts/schemas/per-user-following.ts b/src/services/chart/charts/schemas/per-user-following.ts
index e57869e79a..dffd9c2572 100644
--- a/src/services/chart/charts/schemas/per-user-following.ts
+++ b/src/services/chart/charts/schemas/per-user-following.ts
@@ -1,19 +1,17 @@
-import { types, bool } from '../../../../misc/schema';
-
 export const logSchema = {
 	/**
 	 * フォローしている
 	 */
 	followings: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		properties: {
 			/**
 			 * フォローしている合計
 			 */
 			total: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 				description: 'フォローしている合計',
 			},
 
@@ -21,8 +19,8 @@ export const logSchema = {
 			 * フォローした数
 			 */
 			inc: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 				description: 'フォローした数',
 			},
 
@@ -30,8 +28,8 @@ export const logSchema = {
 			 * フォロー解除した数
 			 */
 			dec: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 				description: 'フォロー解除した数',
 			},
 		}
@@ -41,15 +39,15 @@ export const logSchema = {
 	 * フォローされている
 	 */
 	followers: {
-		type: types.object,
-		optional: bool.false, nullable: bool.false,
+		type: 'object' as const,
+		optional: false as const, nullable: false as const,
 		properties: {
 			/**
 			 * フォローされている合計
 			 */
 			total: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 				description: 'フォローされている合計',
 			},
 
@@ -57,8 +55,8 @@ export const logSchema = {
 			 * フォローされた数
 			 */
 			inc: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 				description: 'フォローされた数',
 			},
 
@@ -66,8 +64,8 @@ export const logSchema = {
 			 * フォロー解除された数
 			 */
 			dec: {
-				type: types.number,
-				optional: bool.false, nullable: bool.false,
+				type: 'number' as const,
+				optional: false as const, nullable: false as const,
 				description: 'フォロー解除された数',
 			},
 		}
@@ -75,17 +73,17 @@ export const logSchema = {
 };
 
 export const schema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		local: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: logSchema
 		},
 		remote: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: logSchema
 		},
 	}
diff --git a/src/services/chart/charts/schemas/per-user-notes.ts b/src/services/chart/charts/schemas/per-user-notes.ts
index 7632450073..778f498c6e 100644
--- a/src/services/chart/charts/schemas/per-user-notes.ts
+++ b/src/services/chart/charts/schemas/per-user-notes.ts
@@ -1,46 +1,44 @@
-import { types, bool } from '../../../../misc/schema';
-
 export const schema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		total: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: '集計期間時点での、全投稿数'
 		},
 
 		inc: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: '増加した投稿数'
 		},
 
 		dec: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: '減少した投稿数'
 		},
 
 		diffs: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: {
 				normal: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: '通常の投稿数の差分'
 				},
 
 				reply: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: 'リプライの投稿数の差分'
 				},
 
 				renote: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: 'Renoteの投稿数の差分'
 				},
 			}
diff --git a/src/services/chart/charts/schemas/per-user-reactions.ts b/src/services/chart/charts/schemas/per-user-reactions.ts
index df7d5a6dbb..d103124ccb 100644
--- a/src/services/chart/charts/schemas/per-user-reactions.ts
+++ b/src/services/chart/charts/schemas/per-user-reactions.ts
@@ -1,12 +1,10 @@
-import { types, bool } from '../../../../misc/schema';
-
 export const logSchema = {
 	/**
 	 * フォローしている合計
 	 */
 	count: {
-		type: types.number,
-		optional: bool.false, nullable: bool.false,
+		type: 'number' as const,
+		optional: false as const, nullable: false as const,
 		description: 'リアクションされた数',
 	},
 };
@@ -15,17 +13,17 @@ export const logSchema = {
  * ユーザーごとのリアクションに関するチャート
  */
 export const schema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		local: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: logSchema
 		},
 		remote: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: logSchema
 		},
 	}
diff --git a/src/services/chart/charts/schemas/test-grouped.ts b/src/services/chart/charts/schemas/test-grouped.ts
index 893458e90a..163ec5bba3 100644
--- a/src/services/chart/charts/schemas/test-grouped.ts
+++ b/src/services/chart/charts/schemas/test-grouped.ts
@@ -1,28 +1,26 @@
-import { types, bool } from '../../../../misc/schema';
-
 export const schema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		foo: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: {
 				total: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: ''
 				},
 
 				inc: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: ''
 				},
 
 				dec: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: ''
 				},
 			}
diff --git a/src/services/chart/charts/schemas/test-unique.ts b/src/services/chart/charts/schemas/test-unique.ts
index 2b3f445ff0..075a8092d9 100644
--- a/src/services/chart/charts/schemas/test-unique.ts
+++ b/src/services/chart/charts/schemas/test-unique.ts
@@ -1,12 +1,10 @@
-import { types, bool } from '../../../../misc/schema';
-
 export const schema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		foo: {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 			description: ''
 		},
 	}
diff --git a/src/services/chart/charts/schemas/test.ts b/src/services/chart/charts/schemas/test.ts
index 9bdc05990b..6142434a89 100644
--- a/src/services/chart/charts/schemas/test.ts
+++ b/src/services/chart/charts/schemas/test.ts
@@ -1,28 +1,26 @@
-import { types, bool } from '../../../../misc/schema';
-
 export const schema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		foo: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: {
 				total: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: ''
 				},
 
 				inc: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: ''
 				},
 
 				dec: {
-					type: types.number,
-					optional: bool.false, nullable: bool.false,
+					type: 'number' as const,
+					optional: false as const, nullable: false as const,
 					description: ''
 				},
 			}
diff --git a/src/services/chart/charts/schemas/users.ts b/src/services/chart/charts/schemas/users.ts
index 6ae6133350..1153369983 100644
--- a/src/services/chart/charts/schemas/users.ts
+++ b/src/services/chart/charts/schemas/users.ts
@@ -1,12 +1,10 @@
-import { types, bool } from '../../../../misc/schema';
-
 const logSchema = {
 	/**
 	 * 集計期間時点での、全ユーザー数
 	 */
 	total: {
-		type: types.number,
-		optional: bool.false, nullable: bool.false,
+		type: 'number' as const,
+		optional: false as const, nullable: false as const,
 		description: '集計期間時点での、全ユーザー数'
 	},
 
@@ -14,8 +12,8 @@ const logSchema = {
 	 * 増加したユーザー数
 	 */
 	inc: {
-		type: types.number,
-		optional: bool.false, nullable: bool.false,
+		type: 'number' as const,
+		optional: false as const, nullable: false as const,
 		description: '増加したユーザー数'
 	},
 
@@ -23,24 +21,24 @@ const logSchema = {
 	 * 減少したユーザー数
 	 */
 	dec: {
-		type: types.number,
-		optional: bool.false, nullable: bool.false,
+		type: 'number' as const,
+		optional: false as const, nullable: false as const,
 		description: '減少したユーザー数'
 	},
 };
 
 export const schema = {
-	type: types.object,
-	optional: bool.false, nullable: bool.false,
+	type: 'object' as const,
+	optional: false as const, nullable: false as const,
 	properties: {
 		local: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: logSchema
 		},
 		remote: {
-			type: types.object,
-			optional: bool.false, nullable: bool.false,
+			type: 'object' as const,
+			optional: false as const, nullable: false as const,
 			properties: logSchema
 		},
 	}
diff --git a/src/services/chart/core.ts b/src/services/chart/core.ts
index 6564ef7813..d5fd9a5c5c 100644
--- a/src/services/chart/core.ts
+++ b/src/services/chart/core.ts
@@ -8,7 +8,7 @@ import * as moment from 'moment';
 import * as nestedProperty from 'nested-property';
 import autobind from 'autobind-decorator';
 import Logger from '../logger';
-import { Schema, bool, types } from '../../misc/schema';
+import { Schema } from '../../misc/schema';
 import { EntitySchema, getRepository, Repository, LessThan, MoreThanOrEqual } from 'typeorm';
 import { isDuplicateKeyValueError } from '../../misc/is-duplicate-key-value-error';
 
@@ -462,8 +462,8 @@ export function convertLog(logSchema: Schema): Schema {
 	if (v.type === 'number') {
 		v.type = 'array';
 		v.items = {
-			type: types.number,
-			optional: bool.false, nullable: bool.false,
+			type: 'number' as const,
+			optional: false as const, nullable: false as const,
 		};
 	} else if (v.type === 'object') {
 		for (const k of Object.keys(v.properties!)) {