diff --git a/synapse/handlers/e2e_keys.py b/synapse/handlers/e2e_keys.py
index 85d7047f6..786fbfb59 100644
--- a/synapse/handlers/e2e_keys.py
+++ b/synapse/handlers/e2e_keys.py
@@ -20,7 +20,6 @@ import logging
 from six import iteritems
 
 import attr
-
 from canonicaljson import encode_canonical_json, json
 from signedjson.key import decode_verify_key_bytes
 from signedjson.sign import SignatureVerifyException, verify_signed_json