diff --git a/apps/api/app/api/routes/generation_cover.py b/apps/api/app/api/routes/generation_cover.py
index 546d9901b..c454099cc 100644
--- a/apps/api/app/api/routes/generation_cover.py
+++ b/apps/api/app/api/routes/generation_cover.py
@@ -112,9 +112,7 @@ def _apply_title_to_cover_image(
         from packages.shared.storage import get_shared_storage_service
         storage_svc = get_shared_storage_service()
         storage_key = f"covers/{plan_id}/titled_cover.jpg"
-        with open(src_path, "rb") as f:
-            file_data = f.read()
-        new_url = storage_svc.upload_bytes(file_data, storage_key, content_type="image/jpeg")
+        new_url = storage_svc.upload_file_smart(src_path, storage_key)
         if new_url:
             return new_url
         logger.warning("[封面标题] OSS 上传返回空: plan_id=%s", plan_id)