diff --git a/socketio/__init__.py b/socketio/__init__.py
index 11feaa3..e437754 100644
--- a/socketio/__init__.py
+++ b/socketio/__init__.py
@@ -24,7 +24,7 @@ __version__ = '1.9.0'
 
 __all__ = ['__version__', 'Middleware', 'Server',
            'BaseManager', 'PubSubManager',
-           'KombuManager', 'RedisManager', 'KafkaManager', 'ZmqManager', 
+           'KombuManager', 'RedisManager', 'KafkaManager', 'ZmqManager',
            'Namespace']
 if AsyncServer is not None:  # pragma: no cover
     __all__ += ['AsyncServer', 'AsyncNamespace', 'AsyncManager',