diff --git a/setup.py b/setup.py
index d49e93300..f87de9bbe 100644
--- a/setup.py
+++ b/setup.py
@@ -1,7 +1,7 @@
 from setuptools import setup, find_packages
 
 
-VERSION = '1.3.3'
+VERSION = '1.3.4.dev0'
 
 
 setup(