diff --git a/apps/pm/services.py b/apps/pm/services.py
index f31fd556..524b47d6 100644
--- a/apps/pm/services.py
+++ b/apps/pm/services.py
@@ -12,7 +12,7 @@ from typing import List
 class PmService:
 
     @classmethod
-    def make_utasks_from_orderitems(cls, user, orderitemIds: List[str], start_date: date, end_date: date, belong_dept: Dept | None):
+    def make_utasks_from_orderitems(cls, user, orderitemIds: List[str], start_date: date, end_date: date, belong_dept):
         start_date_str = start_date.strftime('%Y%m%d')
         if start_date >= end_date:
             raise ParseError('开始时间不可大于结束时间')