diff --git a/src/backend/bisheng/evaluation/domain/services/evaluation_service.py b/src/backend/bisheng/evaluation/domain/services/evaluation_service.py
index 9296de47ba..fd7125dbaa 100644
--- a/src/backend/bisheng/evaluation/domain/services/evaluation_service.py
+++ b/src/backend/bisheng/evaluation/domain/services/evaluation_service.py
@@ -139,7 +139,7 @@ def upload_file(cls, file: UploadFile):
         file_ext = os.path.basename(file.filename).split(".")[-1]
         file_path = f"evaluation/dataset/{file_id}.{file_ext}"
         minio_client.put_object_sync(
-            bucket_name=minio_client.bucket, object_name=file_path, file=file.file, content_type=file.content_type
+            bucket_name=minio_client.bucket, object_name=file_path, file=file.file, content_type="text/csv"
         )
         return file_name, file_path