diff --git a/python/setup.py b/python/setup.py
index ee37098..c48be14 100755
--- a/python/setup.py
+++ b/python/setup.py
@@ -5,7 +5,7 @@ from distutils.core import setup, Extension
 #from Cython.Distutils import build_ext
 import os
 
-version = '0.1.2'
+version = '0.2.0dev'
 
 msgpack_mod = Extension('msgpack._msgpack',
                         #sources=['msgpack/_msgpack.pyx']
diff --git a/python/setup_dev.py b/python/setup_dev.py
index abed7cd..4efc769 100755
--- a/python/setup_dev.py
+++ b/python/setup_dev.py
@@ -5,7 +5,7 @@ from distutils.core import setup, Extension
 from Cython.Distutils import build_ext
 import os
 
-version = '0.1.2dev'
+version = '0.2.0dev'
 
 msgpack_mod = Extension('msgpack._msgpack',
                         sources=['msgpack/_msgpack.pyx']