diff --git a/docs/Doxyfile b/docs/Doxyfile
index 3e4595c..8cf1792 100644
--- a/docs/Doxyfile
+++ b/docs/Doxyfile
@@ -1,5 +1,5 @@
 PROJECT_NAME     = v8eval
-PROJECT_NUMBER   = 0.2.6
+PROJECT_NUMBER   = 0.2.7
 OUTPUT_DIRECTORY = .
 OUTPUT_LANGUAGE  = English
 EXTRACT_ALL      = YES
diff --git a/python/build.sh b/python/build.sh
index 326b19e..6cdd2b6 100755
--- a/python/build.sh
+++ b/python/build.sh
@@ -22,7 +22,7 @@ docs() {
   export LC_ALL=en_US.UTF-8
   export LANG=en_US.UTF-8
   export PYTHONPATH=$V8EVAL_ROOT/python/v8eval
-  sphinx-quickstart -q -p v8eval -a 'Yoshiyuki Mineo' -v 0.1 -r 0.2.6 --ext-autodoc --ext-viewcode
+  sphinx-quickstart -q -p v8eval -a 'Yoshiyuki Mineo' -v 0.1 -r 0.2.7 --ext-autodoc --ext-viewcode
   sphinx-apidoc -M -o . ../v8eval
   perl -ni -e 'die if /Submodules/; print' ./v8eval.rst
   perl -pi -e 'print ":orphan:\n\n" if $. == 1' ./modules.rst
diff --git a/setup.py b/setup.py
index 859217c..284af3b 100755
--- a/setup.py
+++ b/setup.py
@@ -68,7 +68,7 @@
 
 # setup v8eval package
 setup(name='v8eval',
-      version='0.2.6',
+      version='0.2.7',
       author='Yoshiyuki Mineo',
       author_email='Yoshiyuki.Mineo@jp.sony.com',
       license='MIT',
diff --git a/v8eval.gemspec b/v8eval.gemspec
index e5bd50e..cb863b7 100644
--- a/v8eval.gemspec
+++ b/v8eval.gemspec
@@ -1,6 +1,6 @@
 Gem::Specification.new 'v8eval', '1.0' do |s|
   s.name = 'v8eval'
-  s.version = '0.2.6'
+  s.version = '0.2.7'
   s.licenses = ['MIT']
   s.description = 'Run JavaScript engine V8 in Ruby'
   s.summary = 'v8eval gem is ruby binding to the latest V8 4.7 and supports