diff --git a/radicale/app/put.py b/radicale/app/put.py
index 17c103f5..c1f0eacd 100644
--- a/radicale/app/put.py
+++ b/radicale/app/put.py
@@ -30,7 +30,8 @@ from typing import Iterator, List, Mapping, MutableMapping, Optional, Tuple
 import vobject
 
 import radicale.item as radicale_item
-from radicale import httputils, pathutils, rights, storage, types, xmlutils, utils
+from radicale import (httputils, pathutils, rights, storage, types, utils,
+                      xmlutils)
 from radicale.app.base import Access, ApplicationBase
 from radicale.hook import HookNotificationItem, HookNotificationItemTypes
 from radicale.log import logger