diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2aa90ca3..394fb6bc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,15 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+## [2.2.0] - 2019-03-05
+
+### Added
+- `sabactl completion` can generate bash completion scripts (#146).
+
+### Changed
+- Transition from `retiring` to `retired` should be explicitly ordered by `sabactl machines set-state` command (#143).
+- Registering disk encryption keys is prohibited for `retiring` machines in addition to `retired` ones (#143).
+
 ## [2.1.0] - 2019-02-25
 
 ### Added
@@ -70,7 +79,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 See [CHANGELOG-0](./CHANGELOG-0.md).
 
-[Unreleased]: https://github.com/cybozu-go/sabakan/compare/v2.1.0...HEAD
+[Unreleased]: https://github.com/cybozu-go/sabakan/compare/v2.2.0...HEAD
+[2.2.0]: https://github.com/cybozu-go/sabakan/compare/v2.1.0...v2.2.0
 [2.1.0]: https://github.com/cybozu-go/sabakan/compare/v2.0.1...v2.1.0
 [2.0.1]: https://github.com/cybozu-go/sabakan/compare/v2.0.0...v2.0.1
 [2.0.0]: https://github.com/cybozu-go/sabakan/compare/v1.2.0...v2.0.0
diff --git a/version.go b/version.go
index 44a6f37a..1e3ad31a 100644
--- a/version.go
+++ b/version.go
@@ -1,7 +1,7 @@
 package sabakan
 
 // Version is sabakan version
-const Version = "2.1.0"
+const Version = "2.2.0"
 
 // SchemaVersion is the schema version
 const SchemaVersion = "3"