diff --git a/socketio/__init__.py b/socketio/__init__.py
index 7ee5381..9f7f711 100644
--- a/socketio/__init__.py
+++ b/socketio/__init__.py
@@ -19,7 +19,7 @@ else:  # pragma: no cover
     AsyncNamespace = None
     AsyncRedisManager = None
 
-__version__ = '1.8.4'
+__version__ = '1.9.0'
 
 __all__ = ['__version__', 'Middleware', 'Server', 'BaseManager',
            'PubSubManager', 'KombuManager', 'RedisManager', 'ZmqManager',