diff --git a/apps/backend/src/app/storage/storage.service.ts b/apps/backend/src/app/storage/storage.service.ts
index 534b31e..e56dabe 100644
--- a/apps/backend/src/app/storage/storage.service.ts
+++ b/apps/backend/src/app/storage/storage.service.ts
@@ -58,8 +58,7 @@ export class StorageService {
 		 * @return {boolean} - True if the current MIME type is allowed, false otherwise.
 		 */
 		function checkMime(allowedMime: Set<string>, currentMime: string): boolean {
-			for (const mime of allowedMime) if (mime === currentMime) return true;
-			return false;
+			return allowedMime.has(currentMime);
 		}
 
 		const fileType = await FileType.fileTypeFromBuffer(file);