diff --git a/synapse/crypto/context_factory.py b/synapse/crypto/context_factory.py

index f402c795bb..3143322d9c 100644
--- a/synapse/crypto/context_factory.py
+++ b/synapse/crypto/context_factory.py
@@ -20,6 +20,7 @@ import logging
 
 logger = logging.getLogger(__name__)
 
+
 class ServerContextFactory(ssl.ContextFactory):
     """Factory for PyOpenSSL SSL contexts that are used to handle incoming
     connections and to make connections to remote servers."""
@@ -43,4 +44,3 @@ class ServerContextFactory(ssl.ContextFactory):
 
     def getContext(self):
         return self._context
-