diff --git a/CHANGELOG.md b/CHANGELOG.md
index f39dfa0..5670f72 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,16 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+## [0.12.0] - 2023-07-05
+
+### Changed
+
+- Improve runner extend UI on Slack message ([#175](https://github.com/cybozu-go/meows/pull/175))
+
+### Fixed
+
+- Fix Slack notification message layout ([#173](https://github.com/cybozu-go/meows/pull/173))
+
 ## [0.11.0] - 2023-05-12
 
 ### Changed
@@ -167,7 +177,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 - Implement github-actions-controller at minimal (#1)
 
-[Unreleased]: https://github.com/cybozu-go/meows/compare/v0.11.0...HEAD
+[Unreleased]: https://github.com/cybozu-go/meows/compare/v0.12.0...HEAD
+[0.12.0]: https://github.com/cybozu-go/meows/compare/v0.11.0...v0.12.0
 [0.11.0]: https://github.com/cybozu-go/meows/compare/v0.10.0...v0.11.0
 [0.10.0]: https://github.com/cybozu-go/meows/compare/v0.9.1...v0.10.0
 [0.9.1]: https://github.com/cybozu-go/meows/compare/v0.9.0...v0.9.1
diff --git a/config/agent/kustomization.yaml b/config/agent/kustomization.yaml
index b367573..aa3291a 100644
--- a/config/agent/kustomization.yaml
+++ b/config/agent/kustomization.yaml
@@ -2,7 +2,7 @@ namespace: meows
 
 images:
 - name: quay.io/cybozu/meows-controller
-  newTag: 0.11.0
+  newTag: 0.12.0
 
 commonLabels:
   app.kubernetes.io/name: meows
diff --git a/config/controller/kustomization.yaml b/config/controller/kustomization.yaml
index ba96d69..6acfa9c 100644
--- a/config/controller/kustomization.yaml
+++ b/config/controller/kustomization.yaml
@@ -2,7 +2,7 @@ namespace: meows
 
 images:
 - name: quay.io/cybozu/meows-controller
-  newTag: 0.11.0
+  newTag: 0.12.0
 
 namePrefix: meows-
 
diff --git a/constants.go b/constants.go
index 4564219..d172478 100644
--- a/constants.go
+++ b/constants.go
@@ -2,7 +2,7 @@ package constants
 
 const (
 	// Version is the meows version.
-	Version = "0.11.0"
+	Version = "0.12.0"
 )
 
 // Container names