diff --git a/apps/wpm/services.py b/apps/wpm/services.py
index 559a82ed..76917b4a 100644
--- a/apps/wpm/services.py
+++ b/apps/wpm/services.py
@@ -188,7 +188,7 @@ def update_mtask(mtask: Mtask):
         utask.save()
 
 
-def handover_submit(handover: Handover, user: User, now: Union[datetime, None]):
+def handover_submit(handover: Handover, user: User, now: Union[datetime.datetime, None]):
     """
     交接提交后需要执行的操作
     """