diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8c8df06..85b7163 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-## [Unreleased](https://github.com/orisai/clock/compare/1.2.0...v1.x)
+## [Unreleased](https://github.com/orisai/clock/compare/1.2.1...v1.x)
+
+## [1.2.1](https://github.com/orisai/clock/compare/1.2.0...1.2.1) - 2024-06-21
 
 ### Changed