diff --git a/src/zeep/transports.py b/src/zeep/transports.py
index bfaa456c..2a1ee8bd 100644
--- a/src/zeep/transports.py
+++ b/src/zeep/transports.py
@@ -1,6 +1,6 @@
 import logging
 import os
-from contextlib import contextmanager, closing
+from contextlib import closing, contextmanager
 from urllib.parse import urlparse
 
 import requests