diff --git a/CHANGELOG.md b/CHANGELOG.md
index f540c00c..4948b2b6 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]
 
+## [2.21.4] - 2023-10-30
+
 - Update `wasmtime@latest` to 14.0.3.
 
 ## [2.21.3] - 2023-10-29
@@ -1385,7 +1387,8 @@ Note: This release is considered a breaking change because installing on version
 
 Initial release
 
-[Unreleased]: https://github.com/taiki-e/install-action/compare/v2.21.3...HEAD
+[Unreleased]: https://github.com/taiki-e/install-action/compare/v2.21.4...HEAD
+[2.21.4]: https://github.com/taiki-e/install-action/compare/v2.21.3...v2.21.4
 [2.21.3]: https://github.com/taiki-e/install-action/compare/v2.21.2...v2.21.3
 [2.21.2]: https://github.com/taiki-e/install-action/compare/v2.21.1...v2.21.2
 [2.21.1]: https://github.com/taiki-e/install-action/compare/v2.21.0...v2.21.1