diff --git a/apps/users/serializers/group.py b/apps/users/serializers/group.py
index 8dba1025d..102b562a8 100644
--- a/apps/users/serializers/group.py
+++ b/apps/users/serializers/group.py
@@ -53,3 +53,7 @@ class UserGroupSerializer(BulkOrgResourceModelSerializer):
             Prefetch('users', queryset=User.objects.only('id'))
         ).annotate(users_amount=Count('users'))
         return queryset
+
+    def validate_users(self, users):
+        users = [user for user in users if user.role != User.ROLE.AUDITOR]
+        return users