diff --git a/setup.py b/setup.py
index c0d121b..b26b9e8 100755
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@ from distutils.core import setup, Extension
 #from Cython.Distutils import build_ext
 import os
 
-version = '0.1.0'
+version = '0.1.1'
 
 msgpack_mod = Extension('msgpack._msgpack',
                         #sources=['msgpack/_msgpack.pyx']
diff --git a/setup_dev.py b/setup_dev.py
index 255e0db..e28ef25 100755
--- a/setup_dev.py
+++ b/setup_dev.py
@@ -5,7 +5,7 @@ from distutils.core import setup, Extension
 from Cython.Distutils import build_ext
 import os
 
-version = '0.1.0'
+version = '0.1.1dev'
 
 msgpack_mod = Extension('msgpack._msgpack',
                         sources=['msgpack/_msgpack.pyx']