diff --git a/README.md b/README.md
index 685e3114d7..2eef256f82 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ These are the outputs of the detection models supported by ChainerCV.
 
 # Installation
 
-```
+```bash
 $ pip install chainercv
 ```
 
@@ -35,8 +35,8 @@ For additional features
 
 Environments under Python 2.7.12 and 3.6.0 are tested.
 
-The HEAD of the master branch is developed for Chainer v2.
-For users using Chainer v1, please use version 0.4.11, which can be installed by `pip install chainercv==0.4.11`.
++ The master branch will work on both the stable version (v2) and the development version (v3).
++ For users using Chainer v1, please use version `0.4.11`, which can be installed by `pip install chainercv==0.4.11`. This branch is unmaintained.
 
 
 # Features
diff --git a/docs/source/conf.py b/docs/source/conf.py
index cf37cd7609..ae2ec8180e 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -71,9 +71,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = u'0.5.1'
+version = u'0.6.0'
 # The full version, including alpha/beta/rc tags.
-release = u'0.5.1'
+release = u'0.6.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/setup.py b/setup.py
index 1994879f6e..63ee4b7f62 100644
--- a/setup.py
+++ b/setup.py
@@ -78,7 +78,7 @@ def build_extensions(self):
 
 setup(
     name='chainercv',
-    version='0.5.1',
+    version='0.6.0',
     packages=find_packages(),
     author='Yusuke Niitani',
     author_email='yuyuniitani@gmail.com',