diff --git a/CHANGELOG.md b/CHANGELOG.md
index d6b23feb..3307ead9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,17 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+## [0.6.6] - 2021-12-10
+
+### Changed
+
+- update supported k8s version to 1.22 (#75)
+  - kubernetes 1.22.1
+  - contour 1.19.1
+  - cert-manager 1.6.1
+  - external-dns 0.10.1
+- Change LICENSE from MIT to Apache 2.0 (#73)
+
 ## [0.6.5] - 2021-09-17
 
 ## Changed
@@ -181,7 +192,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
     - for [ExternalDNS][] v0.5.14
     - for [cert-manager][] v0.8.0
 
-[Unreleased]: https://github.com/cybozu-go/contour-plus/compare/v0.6.5...HEAD
+[Unreleased]: https://github.com/cybozu-go/contour-plus/compare/v0.6.6...HEAD
+[0.6.6]: https://github.com/cybozu-go/contour-plus/compare/v0.6.5...v0.6.6
 [0.6.5]: https://github.com/cybozu-go/contour-plus/compare/v0.6.4...v0.6.5
 [0.6.4]: https://github.com/cybozu-go/contour-plus/compare/v0.6.3...v0.6.4
 [0.6.3]: https://github.com/cybozu-go/contour-plus/compare/v0.6.2...v0.6.3