diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1a42573..e7631bf 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [5.0.0] - 2026-01-28
+
+### Changed
+
+- **BREAKING**: Upgrade Rails to 8.1
+
 ## [4.0.0] - 2026-01-28
 
 ### Changed
@@ -125,7 +131,8 @@ We have not released a new version of tokite gem for a long time. Be careful whe
 - Fix an error occurred when a query contains wrong regular expressions (https://github.com/cookpad/tokite/pull/43).
 
 
-[Unreleased]: https://github.com/cookpad/tokite/compare/v4.0.0...HEAD
+[Unreleased]: https://github.com/cookpad/tokite/compare/v5.0.0...HEAD
+[5.0.0]: https://github.com/cookpad/tokite/compare/v4.0.0...v5.0.0
 [4.0.0]: https://github.com/cookpad/tokite/compare/v3.0.0...v4.0.0
 [3.0.0]: https://github.com/cookpad/tokite/compare/v2.0.0...v3.0.0
 [2.0.0]: https://github.com/cookpad/tokite/compare/v1.0.0...v2.0.0
diff --git a/lib/tokite/version.rb b/lib/tokite/version.rb
index bac0bf3..9123304 100644
--- a/lib/tokite/version.rb
+++ b/lib/tokite/version.rb
@@ -1,3 +1,3 @@
 module Tokite
-  VERSION = '4.0.0'
+  VERSION = '5.0.0'
 end