diff --git a/CHANGELOG.md b/CHANGELOG.md
index b77ecd10..36b2d05e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,8 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+## [2.1.1] - 2023-01-05
+
 - Emit warning if tool is not specified.
 
   If you encounter this warning, it may be due to a dependabot bug that handles `@<tool>` shorthand in wrong way.
@@ -514,7 +516,8 @@ Note: This release is considered a breaking change because installing on version
 
 Initial release
 
-[Unreleased]: https://github.com/taiki-e/install-action/compare/v2.1.0...HEAD
+[Unreleased]: https://github.com/taiki-e/install-action/compare/v2.1.1...HEAD
+[2.1.1]: https://github.com/taiki-e/install-action/compare/v2.1.0...v2.1.1
 [2.1.0]: https://github.com/taiki-e/install-action/compare/v2.0.3...v2.1.0
 [2.0.3]: https://github.com/taiki-e/install-action/compare/v2.0.2...v2.0.3
 [2.0.2]: https://github.com/taiki-e/install-action/compare/v2.0.1...v2.0.2