diff --git a/python/wcferry/client.py b/python/wcferry/client.py
index 8e38733..701d336 100644
--- a/python/wcferry/client.py
+++ b/python/wcferry/client.py
@@ -1,7 +1,7 @@
 #! /usr/bin/env python3
 # -*- coding: utf-8 -*-
 
-__version__ = "39.0.0.0a2"
+__version__ = "39.0.0.0a3"
 
 import atexit
 import base64