2 files changed, 2 insertions, 5 deletions
diff --git a/synapse/push/mailer.py b/synapse/push/mailer.py
index d57a66a697..dda560b2c2 100644
--- a/synapse/push/mailer.py
+++ b/synapse/push/mailer.py
@@ -17,12 +17,11 @@ import email.mime.multipart
 import email.utils
 import logging
 import time
+import urllib
 from email.mime.multipart import MIMEMultipart
 from email.mime.text import MIMEText
 from typing import Iterable, List, TypeVar
 
-from six.moves import urllib
-
 import bleach
 import jinja2
 
diff --git a/synapse/push/push_rule_evaluator.py b/synapse/push/push_rule_evaluator.py
index aeac257a6e..8e0d3a416d 100644
--- a/synapse/push/push_rule_evaluator.py
+++ b/synapse/push/push_rule_evaluator.py
@@ -18,8 +18,6 @@ import logging
 import re
 from typing import Pattern
 
-from six import string_types
-
 from synapse.events import EventBase
 from synapse.types import UserID
 from synapse.util.caches import register_cache
@@ -244,7 +242,7 @@ def _flatten_dict(d, prefix=[], result=None):
     if result is None:
         result = {}
     for key, value in d.items():
-        if isinstance(value, string_types):
+        if isinstance(value, str):
             result[".".join(prefix + [key])] = value.lower()
         elif hasattr(value, "items"):
             _flatten_dict(value, prefix=(prefix + [key]), result=result)