1 files changed, 2 insertions, 4 deletions
diff --git a/synapse/crypto/keyring.py b/synapse/crypto/keyring.py
index a9f4025bfe..dbfc3e8972 100644
--- a/synapse/crypto/keyring.py
+++ b/synapse/crypto/keyring.py
@@ -15,11 +15,9 @@
 # limitations under the License.
 
 import logging
+import urllib
 from collections import defaultdict
 
-import six
-from six.moves import urllib
-
 import attr
 from signedjson.key import (
     decode_verify_key_bytes,
@@ -661,7 +659,7 @@ class PerspectivesKeyFetcher(BaseV2KeyFetcher):
         for response in query_response["server_keys"]:
             # do this first, so that we can give useful errors thereafter
             server_name = response.get("server_name")
-            if not isinstance(server_name, six.string_types):
+            if not isinstance(server_name, str):
                 raise KeyLookupError(
                     "Malformed response from key notary server %s: invalid server_name"
                     % (perspective_name,)