diff --git a/radicale/__init__.py b/radicale/__init__.py
index 4e7cbb0..b1631d3 100644
--- a/radicale/__init__.py
+++ b/radicale/__init__.py
@@ -40,7 +40,6 @@ import threading
 import urllib
 import wsgiref.simple_server
 import zlib
-from contextlib import contextmanager
 from http import client
 from urllib.parse import unquote, urlparse