diff --git a/apps/authentication/api/dingtalk.py b/apps/authentication/api/dingtalk.py
index e4b2ea85b..ce1732118 100644
--- a/apps/authentication/api/dingtalk.py
+++ b/apps/authentication/api/dingtalk.py
@@ -21,7 +21,7 @@ class DingTalkQRUnBindBase(APIView):
         if not user.dingtalk_id:
             raise errors.DingTalkNotBound
 
-        user.dingtalk_id = ''
+        user.dingtalk_id = None
         user.save()
         return Response()
 
diff --git a/apps/authentication/api/wecom.py b/apps/authentication/api/wecom.py
index 1ab5ff725..c66da5f79 100644
--- a/apps/authentication/api/wecom.py
+++ b/apps/authentication/api/wecom.py
@@ -21,7 +21,7 @@ class WeComQRUnBindBase(APIView):
         if not user.wecom_id:
             raise errors.WeComNotBound
 
-        user.wecom_id = ''
+        user.wecom_id = None
         user.save()
         return Response()