diff --git a/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts b/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts
index adcbe6077..f343e1b69 100644
--- a/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts
+++ b/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts
@@ -236,20 +236,14 @@ export class MastodonApiServerService {
 			}
 		});
 
-		fastify.patch('/v1/accounts/update_credentials', { preHandler: upload.single('file') }, async (_request, reply) => {
+		fastify.patch('/v1/accounts/update_credentials', async (_request, reply) => {
 			const BASE_URL = `${_request.protocol}://${_request.hostname}`;
 			const accessTokens = _request.headers.authorization;
 			const client = getClient(BASE_URL, accessTokens); // we are using this here, because in private mode some info isnt
 			// displayed without being logged in
 			try {
-				const multipartData = await _request.file;
-				if (!multipartData) {
-					const data = await client.updateCredentials(_request.body!);
-					reply.send(convertAccount(data.data));
-				} else {
-					const data = await client.updateCredentials(_request.body!, multipartData);
-					reply.send(convertAccount(data.data));
-				}
+				const data = await client.updateCredentials(_request.body!);
+				reply.send(convertAccount(data.data));
 			} catch (e: any) {
 				/* console.error(e); */
 				reply.code(401).send(e.response.data);
diff --git a/packages/megalodon/src/megalodon.ts b/packages/megalodon/src/megalodon.ts
index b29325477..19cd5c555 100644
--- a/packages/megalodon/src/megalodon.ts
+++ b/packages/megalodon/src/megalodon.ts
@@ -149,7 +149,7 @@ export interface MegalodonInterface {
       language?: string
     }
     fields_attributes?: Array<{ name: string; value: string }>
-  }, file?: any): Promise<Response<Entity.Account>>
+  }): Promise<Response<Entity.Account>>
   /**
    * View information about a profile.
    *
diff --git a/packages/megalodon/src/misskey.ts b/packages/megalodon/src/misskey.ts
index 69884bf60..5640ce19b 100644
--- a/packages/megalodon/src/misskey.ts
+++ b/packages/megalodon/src/misskey.ts
@@ -220,7 +220,7 @@ export default class Misskey implements MegalodonInterface {
       language?: string
     } | null
     fields_attributes?: Array<{ name: string; value: string }>
-  }, file?: any): Promise<Response<Entity.Account>> {
+  }): Promise<Response<Entity.Account>> {
     let params = {}
     if (options) {
       if (options.bot !== undefined) {
@@ -233,18 +233,6 @@ export default class Misskey implements MegalodonInterface {
           name: options.display_name
         })
       }
-      if (options.avatar) {
-        const media = await this.uploadMedia(file);
-        params = Object.assign(params, {
-          avatarId: media.data.id
-        })
-      }
-      if (options.header) {
-        const media = await this.uploadMedia(file);
-        params = Object.assign(params, {
-          headerId: media.data.id
-        })
-      }
       if (options.note) {
         params = Object.assign(params, {
           description: options.note