diff --git a/setup.py b/setup.py
index c3c68a3..cbd54d9 100644
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,7 @@ from setuptools import find_packages
 from setuptools import setup
 
 
-version = '3.4.2'
+version = '3.4.3.dev0'
 
 install_requires = [
     'setuptools',