diff --git a/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts b/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts
index 128cb3491a..cd0fe2433d 100644
--- a/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts
+++ b/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts
@@ -93,7 +93,7 @@ export class MastodonApiServerService {
 					},
 					order: { id: 'ASC' },
 				});
-				const contact = admin == null ? null : convertAccount((await client.getAccount(admin.id)).data);
+				const contact = admin == null ? null : convertAccount((await client.getAccount(admin.id, BASE_URL)).data);
 				reply.send(await getInstance(data.data, contact, this.config, await this.metaService.fetch()));
 			} catch (e: any) {
 				/* console.error(e); */
diff --git a/packages/megalodon/src/megalodon.ts b/packages/megalodon/src/megalodon.ts
index 57ed58c3d2..d75d13cf22 100644
--- a/packages/megalodon/src/megalodon.ts
+++ b/packages/megalodon/src/megalodon.ts
@@ -156,7 +156,7 @@ export interface MegalodonInterface {
    * @param id The account ID.
    * @return An account.
    */
-  getAccount(id: string): Promise<Response<Entity.Account>>
+  getAccount(id: string, host?: string): Promise<Response<Entity.Account>>
   /**
    * Statuses posted to the given account.
    *
diff --git a/packages/megalodon/src/misskey.ts b/packages/megalodon/src/misskey.ts
index b40ad9a43e..0d513651b1 100644
--- a/packages/megalodon/src/misskey.ts
+++ b/packages/megalodon/src/misskey.ts
@@ -266,14 +266,14 @@ export default class Misskey implements MegalodonInterface {
   /**
    * POST /api/users/show
    */
-  public async getAccount(id: string): Promise<Response<Entity.Account>> {
+  public async getAccount(id: string, host?: string): Promise<Response<Entity.Account>> {
     return this.client
       .post<MisskeyAPI.Entity.UserDetail>('/api/users/show', {
         userId: id
       })
       .then(res => {
         return Object.assign(res, {
-          data: MisskeyAPI.Converter.userDetail(res.data)
+          data: MisskeyAPI.Converter.userDetail(res.data, host)
         })
       })
   }