diff --git a/app/service/lineart/service.py b/app/service/lineart/service.py
index e8fc78f..34f29dc 100644
--- a/app/service/lineart/service.py
+++ b/app/service/lineart/service.py
@@ -53,8 +53,8 @@ class LineArtService:
     def put_image(self, image):
         try:
             image_bytes = cv2.imencode('.jpg', image)[1].tobytes()
-            oss_upload_image(bucket=self.sketch_bucket, object_name=self.sketch_name, image_bytes=image_bytes)
-            return f"{self.sketch_bucket}/{self.sketch_name}"
+            oss_upload_image(bucket=self.sketch_bucket, object_name=f"{self.sketch_name}.jpg", image_bytes=image_bytes)
+            return f"{self.sketch_bucket}/{self.sketch_name}.jpg"
         except Exception as e:
             logger.warning(e)