diff --git a/CHANGELOG.md b/CHANGELOG.md
index c0b2d7af98..aed56aa83f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ You should also include the user name that made the change.
 
 ### Bugfixes
 - Client: 一度作ったwebhookの設定画面を開こうとするとページがフリーズする @syuilo
+- Client: MiAuth認証ページが機能していない @syuilo
 
 ## 12.117.1 (2022/07/19)
 
diff --git a/packages/client/src/pages/miauth.vue b/packages/client/src/pages/miauth.vue
index 4b3ac7761e..cbdf6b2832 100644
--- a/packages/client/src/pages/miauth.vue
+++ b/packages/client/src/pages/miauth.vue
@@ -1,85 +1,88 @@
 <template>
-<div v-if="$i">
-	<div v-if="state == 'waiting'" class="waiting _section">
-		<div class="_content">
-			<MkLoading/>
+<MkSpacer :content-max="800">
+	<div v-if="$i">
+		<div v-if="state == 'waiting'" class="waiting _section">
+			<div class="_content">
+				<MkLoading/>
+			</div>
+		</div>
+		<div v-if="state == 'denied'" class="denied _section">
+			<div class="_content">
+				<p>{{ i18n.ts._auth.denied }}</p>
+			</div>
+		</div>
+		<div v-else-if="state == 'accepted'" class="accepted _section">
+			<div class="_content">
+				<p v-if="callback">{{ i18n.ts._auth.callback }}<MkEllipsis/></p>
+				<p v-else>{{ i18n.ts._auth.pleaseGoBack }}</p>
+			</div>
+		</div>
+		<div v-else class="_section">
+			<div v-if="name" class="_title">{{ $t('_auth.shareAccess', { name: name }) }}</div>
+			<div v-else class="_title">{{ i18n.ts._auth.shareAccessAsk }}</div>
+			<div class="_content">
+				<p>{{ i18n.ts._auth.permissionAsk }}</p>
+				<ul>
+					<li v-for="p in _permissions" :key="p">{{ $t(`_permissions.${p}`) }}</li>
+				</ul>
+			</div>
+			<div class="_footer">
+				<MkButton inline @click="deny">{{ i18n.ts.cancel }}</MkButton>
+				<MkButton inline primary @click="accept">{{ i18n.ts.accept }}</MkButton>
+			</div>
 		</div>
 	</div>
-	<div v-if="state == 'denied'" class="denied _section">
-		<div class="_content">
-			<p>{{ $ts._auth.denied }}</p>
-		</div>
+	<div v-else class="signin">
+		<MkSignin @login="onLogin"/>
 	</div>
-	<div v-else-if="state == 'accepted'" class="accepted _section">
-		<div class="_content">
-			<p v-if="callback">{{ $ts._auth.callback }}<MkEllipsis/></p>
-			<p v-else>{{ $ts._auth.pleaseGoBack }}</p>
-		</div>
-	</div>
-	<div v-else class="_section">
-		<div v-if="name" class="_title">{{ $t('_auth.shareAccess', { name: name }) }}</div>
-		<div v-else class="_title">{{ $ts._auth.shareAccessAsk }}</div>
-		<div class="_content">
-			<p>{{ $ts._auth.permissionAsk }}</p>
-			<ul>
-				<li v-for="p in permission" :key="p">{{ $t(`_permissions.${p}`) }}</li>
-			</ul>
-		</div>
-		<div class="_footer">
-			<MkButton inline @click="deny">{{ $ts.cancel }}</MkButton>
-			<MkButton inline primary @click="accept">{{ $ts.accept }}</MkButton>
-		</div>
-	</div>
-</div>
-<div v-else class="signin">
-	<MkSignin @login="onLogin"/>
-</div>
+</MkSpacer>
 </template>
 
-<script lang="ts">
-import { defineComponent } from 'vue';
+<script lang="ts" setup>
+import { } from 'vue';
 import MkSignin from '@/components/signin.vue';
 import MkButton from '@/components/ui/button.vue';
 import * as os from '@/os';
-import { login } from '@/account';
+import { $i, login } from '@/account';
 import { appendQuery, query } from '@/scripts/url';
+import { i18n } from '@/i18n';
 
-export default defineComponent({
-	components: {
-		MkSignin,
-		MkButton,
-	},
-	props: ['session', 'callback', 'name', 'icon', 'permission'],
-	data() {
-		return {
-			state: null,
-		};
-	},
-	methods: {
-		async accept() {
-			this.state = 'waiting';
-			await os.api('miauth/gen-token', {
-				session: this.session,
-				name: this.name,
-				iconUrl: this.icon,
-				permission: this.permission,
-			});
+const props = defineProps<{
+	session: string;
+	callback?: string;
+	name: string;
+	icon: string;
+	permission: string; // コンマ区切り
+}>();
 
-			this.state = 'accepted';
-			if (this.callback) {
-				location.href = appendQuery(this.callback, query({
-					session: this.session,
-				}));
-			}
-		},
-		deny() {
-			this.state = 'denied';
-		},
-		onLogin(res) {
-			login(res.i);
-		},
-	},
-});
+const _permissions = props.permission.split(',');
+
+let state = $ref<string | null>(null);
+
+async function accept(): Promise<void> {
+	state = 'waiting';
+	await os.api('miauth/gen-token', {
+		session: props.session,
+		name: props.name,
+		iconUrl: props.icon,
+		permission: _permissions,
+	});
+
+	state = 'accepted';
+	if (props.callback) {
+		location.href = appendQuery(props.callback, query({
+			session: props.session,
+		}));
+	}
+}
+
+function deny(): void {
+	state = 'denied';
+}
+
+function onLogin(res): void {
+	login(res.i);
+}
 </script>
 
 <style lang="scss" scoped>