diff --git a/python/.gitignore b/python/.gitignore
index 430c633e..8531de3f 100644
--- a/python/.gitignore
+++ b/python/.gitignore
@@ -3,3 +3,4 @@ build/*
 dist/*
 *.pyc
 *.pyo
+msgpack/__version__.py
diff --git a/python/Makefile b/python/Makefile
index e06794da..245c09c2 100644
--- a/python/Makefile
+++ b/python/Makefile
@@ -1,7 +1,12 @@
+.PHONY: test all python3
+
 all:
 	python setup.py build_ext -i -f
 	python setup.py build sdist
 
-.PHONY: test
+python3:
+	python3 setup.py build_ext -i -f
+	python3 setup.py build sdist
+
 test:
 	nosetests test
diff --git a/python/msgpack/__init__.py b/python/msgpack/__init__.py
index 86786a27..cdf045fb 100644
--- a/python/msgpack/__init__.py
+++ b/python/msgpack/__init__.py
@@ -1,4 +1,5 @@
 # coding: utf-8
+from msgpack.__version__ import *
 from msgpack._msgpack import *
 
 # alias for compatibility to simplejson/marshal/pickle.
diff --git a/python/setup.py b/python/setup.py
index 64e71ede..c79c1487 100755
--- a/python/setup.py
+++ b/python/setup.py
@@ -1,5 +1,6 @@
 #!/usr/bin/env python
 # coding: utf-8
+version = (0, 1, 5, 'dev')
 
 import os
 from glob import glob
@@ -14,7 +15,10 @@ except ImportError:
     from distutils.command.build_ext import build_ext
     have_cython = False
 
-version = '0.1.4'
+# make msgpack/__verison__.py
+f = open('msgpack/__version__.py', 'w')
+f.write("version = %r\n" % (version,))
+f.close()
 
 # take care of extension modules.
 if have_cython:
@@ -53,7 +57,7 @@ What's MessagePack? (from http://msgpack.sourceforge.net/)
 setup(name='msgpack-python',
       author='INADA Naoki',
       author_email='songofacandy@gmail.com',
-      version=version,
+      version=''.join(str(x) for x in version),
       cmdclass={'build_ext': build_ext, 'sdist': Sdist},
       ext_modules=[msgpack_mod],
       packages=['msgpack'],