diff --git a/CHANGELOG.md b/CHANGELOG.md
index 82f36e3..aafad20 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,10 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+## [1.8.1] - 2018-10-21
+### Changed
+- Remove dependency on `github.com/spf13/cobra`.
+
 ## [1.8.0] - 2018-10-21
 ### Added
 - Support for users of [github.com/spf13/cobra](https://github.com/spf13/cobra) and its friends (#24).
@@ -83,7 +87,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 - Conform to cybozu-go/log v1.1.0 spec.
 
 [activation]: http://0pointer.de/blog/projects/socket-activation.html
-[Unreleased]: https://github.com/cybozu-go/cmd/compare/v1.8.0...HEAD
+[Unreleased]: https://github.com/cybozu-go/cmd/compare/v1.8.1...HEAD
+[1.8.1]: https://github.com/cybozu-go/cmd/compare/v1.8.0...v1.8.1
 [1.8.0]: https://github.com/cybozu-go/cmd/compare/v1.7.0...v1.8.0
 [1.7.0]: https://github.com/cybozu-go/cmd/compare/v1.6.0...v1.7.0
 [1.6.0]: https://github.com/cybozu-go/cmd/compare/v1.5.0...v1.6.0