diff --git a/backend/services/history.py b/backend/services/history.py
index 0e5cd8a7..10e1ee5a 100644
--- a/backend/services/history.py
+++ b/backend/services/history.py
@@ -465,7 +465,7 @@ def scan_and_sync_task_images(self, task_id: str) -> Dict[str, Any]:
             def get_index(filename):
                 try:
                     return int(filename.split('.')[0])
-                except:
+                except Exception:
                     return 999
 
             image_files.sort(key=get_index)