diff --git a/flask_socketio/__init__.py b/flask_socketio/__init__.py
index 989bf162..757a2cbe 100644
--- a/flask_socketio/__init__.py
+++ b/flask_socketio/__init__.py
@@ -22,7 +22,7 @@
 from .namespace import Namespace
 from .test_client import SocketIOTestClient
 
-__version__ = '2.9.0'
+__version__ = '2.9.1'
 
 
 class _SocketIOMiddleware(socketio.Middleware):