diff --git a/apps/hrm/services.py b/apps/hrm/services.py
index 07af774d..c1334829 100755
--- a/apps/hrm/services.py
+++ b/apps/hrm/services.py
@@ -7,6 +7,7 @@ from datetime import datetime
 
 class HrmService:
 
+    @classmethod
     def sync_dahua_employee(cls, ep: Employee, old_photo=''):
         dh_id = None
         dh_photo = None