diff --git a/apps/users/serializers/group.py b/apps/users/serializers/group.py
index e05546bba..2276b6e0e 100644
--- a/apps/users/serializers/group.py
+++ b/apps/users/serializers/group.py
@@ -16,7 +16,8 @@ __all__ = [
 
 class UserGroupSerializer(ResourceLabelsMixin, BulkOrgResourceModelSerializer):
     users = ObjectRelatedField(
-        required=False, many=True, queryset=User.objects, label=_('User'),
+        required=False, many=True, queryset=User.objects,
+        attrs=("id", "name", "is_service_account"), label=_('User'),
     )
 
     class Meta: