diff --git a/apps/vm/services.py b/apps/vm/services.py
index 0cde4d07..e3436a23 100644
--- a/apps/vm/services.py
+++ b/apps/vm/services.py
@@ -25,7 +25,7 @@ def bind_visit(ticket, transition, new_ticket_data: dict):
     ticket_data = ticket.ticket_data
     ticket_data.update({
         'purpose': visit.purpose,
-        'belong_dept': visit.belong_dept
+        'belong_dept': visit.belong_dept.id
     })
     ticket.ticket_data = ticket_data
     ticket.belong_dept = visit.belong_dept