diff --git a/socketio/__init__.py b/socketio/__init__.py
index 32cd971..11feaa3 100644
--- a/socketio/__init__.py
+++ b/socketio/__init__.py
@@ -22,9 +22,10 @@ else:  # pragma: no cover
 
 __version__ = '1.9.0'
 
-__all__ = ['__version__', 'Middleware', 'Server', 'BaseManager',
-           'PubSubManager', 'KombuManager', 'RedisManager', 'KafkaManager',
-           'ZmqManager', 'Namespace']
+__all__ = ['__version__', 'Middleware', 'Server',
+           'BaseManager', 'PubSubManager',
+           'KombuManager', 'RedisManager', 'KafkaManager', 'ZmqManager', 
+           'Namespace']
 if AsyncServer is not None:  # pragma: no cover
     __all__ += ['AsyncServer', 'AsyncNamespace', 'AsyncManager',
                 'AsyncRedisManager']