diff --git a/acme/acme/client.py b/acme/acme/client.py
index 46384cd85..4c02fde94 100644
--- a/acme/acme/client.py
+++ b/acme/acme/client.py
@@ -1,11 +1,10 @@
 """ACME client API."""
 import collections
+import datetime
 import heapq
 import logging
 import time
 
-import datetime
-
 import six
 from six.moves import http_client  # pylint: disable=import-error