diff --git a/setup.py b/setup.py
index 97cad8c..46df2fd 100644
--- a/setup.py
+++ b/setup.py
@@ -2,7 +2,7 @@ from distutils.core import setup
 
 setup(
     name='sphinx-py3-api',
-    version='2.3.1',
+    version='2.3.1-beta',
     packages=['sphinxapi'],
     url='https://github.com/jar3b/sphinx-py3-api',
     license='MIT',