diff --git a/CHANGELOG.md b/CHANGELOG.md
index b1239e2..0dde2b4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+## [2.3.1] - 2021-08-01
+
 ### Security
 
 * Fix [CVE-2021-33502](https://github.com/advisories/GHSA-px4h-xg32-q955)
@@ -155,7 +157,8 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 * First release.
 
-[Unreleased]: https://github.com/shimataro/ssh-key-action/compare/v2.3.0...HEAD
+[Unreleased]: https://github.com/shimataro/ssh-key-action/compare/v2.3.1...HEAD
+[2.3.1]: https://github.com/shimataro/ssh-key-action/compare/v2.3.0...v2.3.1
 [2.3.0]: https://github.com/shimataro/ssh-key-action/compare/v2.2.0...v2.3.0
 [2.2.0]: https://github.com/shimataro/ssh-key-action/compare/v2.1.0...v2.2.0
 [2.1.0]: https://github.com/shimataro/ssh-key-action/compare/v2.0.3...v2.1.0
diff --git a/package-lock.json b/package-lock.json
index 0e77b37..5c4a20b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "install-ssh-key",
-  "version": "2.3.0",
+  "version": "2.3.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 107c31c..3d21be9 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "install-ssh-key",
-  "version": "2.3.0",
+  "version": "2.3.1",
   "private": true,
   "description": "Install SSH key in .ssh",
   "main": "lib/index.js",