diff --git a/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts b/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts
index c35f318ac7..601dd2b950 100644
--- a/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts
+++ b/packages/backend/src/server/api/mastodon/MastodonApiServerService.ts
@@ -241,7 +241,7 @@ export class MastodonApiServerService {
 			const client = this.clientService.getClient(_request);
 
 			const data = await client.getMutes(parseTimelineArgs(_request.query));
-			const response = Promise.all(data.data.map((account) => this.mastoConverters.convertAccount(account)));
+			const response = await Promise.all(data.data.map((account) => this.mastoConverters.convertAccount(account)));
 
 			reply.send(response);
 		});