diff --git a/packages/backend/src/server/api/mastodon/endpoints/auth.ts b/packages/backend/src/server/api/mastodon/endpoints/auth.ts
index 63dbcc3649..6425aac09a 100644
--- a/packages/backend/src/server/api/mastodon/endpoints/auth.ts
+++ b/packages/backend/src/server/api/mastodon/endpoints/auth.ts
@@ -43,10 +43,7 @@ const writeScope = [
 
 export function apiAuthMastodon(router: Router): void {
 
-	router.post('/v1/apps', koaBody({
-		json: false,
-		multipart: true
-	}), async (ctx) => {
+	router.post('/v1/apps', async (ctx) => {
 		const BASE_URL = `${ctx.request.protocol}://${ctx.request.hostname}`;
 		const accessTokens = ctx.request.headers.authorization;
 		const client = getClient(BASE_URL, accessTokens);