diff --git a/vdirsyncer/http.py b/vdirsyncer/http.py
index eee0089..0e28c96 100644
--- a/vdirsyncer/http.py
+++ b/vdirsyncer/http.py
@@ -12,12 +12,10 @@ from ssl import create_default_context
 import aiohttp
 import requests.auth
 from requests.utils import parse_dict_header
-from tenacity import (
-    retry,
-    retry_if_exception_type,
-    stop_after_attempt,
-    wait_exponential,
-)
+from tenacity import retry
+from tenacity import retry_if_exception_type
+from tenacity import stop_after_attempt
+from tenacity import wait_exponential
 
 from . import __version__
 from . import exceptions