diff --git a/CHANGELOG.md b/CHANGELOG.md
index b04f0d9..01892b8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,17 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 This file is automatically generated by [git-chglog](https://github.com/git-chglog/git-chglog). Don't edit by hand.
 
 
+<a name="v0.3.1"></a>
+## [v0.3.1](https://github.com/mercari/tfnotify/compare/v0.3.0...v0.3.1) (2019-07-30)
+
+### Pull Requests
+
+* Merge pull request [#41](https://github.com/mercari/tfnotify/issues/41) from fumikony/codebuild-envvar
+* Merge pull request [#32](https://github.com/mercari/tfnotify/issues/32) from mdolinin/bugfix/add-travis-ci-build-url-to-config
+* Merge pull request [#31](https://github.com/mercari/tfnotify/issues/31) from is2ei/fix-test
+* Merge pull request [#30](https://github.com/mercari/tfnotify/issues/30) from is2ei/fix-comment
+
+
 <a name="v0.3.0"></a>
 ## [v0.3.0](https://github.com/mercari/tfnotify/compare/v0.2.0...v0.3.0) (2019-01-16)
 
diff --git a/main.go b/main.go
index eb9e8c2..d2d1010 100644
--- a/main.go
+++ b/main.go
@@ -18,7 +18,7 @@ import (
 const (
 	name        = "tfnotify"
 	description = "Notify the execution result of terraform command"
-	version     = "0.3.0"
+	version     = "0.3.1"
 )
 
 type tfnotify struct {