diff --git a/flask_socketio/__init__.py b/flask_socketio/__init__.py
index 0f47a51e..2b02326f 100644
--- a/flask_socketio/__init__.py
+++ b/flask_socketio/__init__.py
@@ -24,7 +24,7 @@
 from .namespace import Namespace
 from .test_client import SocketIOTestClient
 
-__version__ = '3.3.0'
+__version__ = '3.3.1'
 
 
 class _SocketIOMiddleware(socketio.WSGIApp):