diff --git a/app/api/endpoints/upload.py b/app/api/endpoints/upload.py
index 09d429e..4a7e702 100644
--- a/app/api/endpoints/upload.py
+++ b/app/api/endpoints/upload.py
@@ -22,11 +22,12 @@ async def upload_to_cos(file: UploadFile) -> str:
         Bucket=settings.COS_BUCKET,
         Body=await file.read(),
         Key=filename,
-        ContentType=file.content_type
+        ContentType=file.content_type,
+        ACL="public-read"
     )
     
     # 返回文件URL
-    return f"{settings.COS_BASE_URL}/{filename}"
+    return f"https://{settings.COS_BASE_URL}/{filename}"
 
 @router.post("/image", response_model=ResponseModel)
 async def upload_image(