diff --git a/CHANGELOG.md b/CHANGELOG.md
index 20dd199c..b7e34e66 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]
 
+## [2.56.1] - 2025-07-01
+
 - Update `release-plz@latest` to 0.3.137.
 
 ## [2.56.0] - 2025-07-01
@@ -4066,7 +4068,8 @@ Note: This release is considered a breaking change because installing on version
 
 Initial release
 
-[Unreleased]: https://github.com/taiki-e/install-action/compare/v2.56.0...HEAD
+[Unreleased]: https://github.com/taiki-e/install-action/compare/v2.56.1...HEAD
+[2.56.1]: https://github.com/taiki-e/install-action/compare/v2.56.0...v2.56.1
 [2.56.0]: https://github.com/taiki-e/install-action/compare/v2.55.4...v2.56.0
 [2.55.4]: https://github.com/taiki-e/install-action/compare/v2.55.3...v2.55.4
 [2.55.3]: https://github.com/taiki-e/install-action/compare/v2.55.2...v2.55.3