diff --git a/CHANGELOG.md b/CHANGELOG.md
index da10ecd8..fa97d245 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,14 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+## [2.5.1] - 2023-11-27
+
+### Changed
+
+- Update gRPC modules (#259)
+- Update dependencies (#261)
+- Add logs (#262)
+
 ## [2.5.0] - 2023-10-26
 
 ### Added
@@ -211,7 +219,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 Coil version 2 is a complete rewrite of Coil version 1.
 This is the first release candidate with all the planned features implemented.
 
-[Unreleased]: https://github.com/cybozu-go/coil/compare/v2.5.0...HEAD
+[Unreleased]: https://github.com/cybozu-go/coil/compare/v2.5.1...HEAD
+[2.5.1]: https://github.com/cybozu-go/coil/compare/v2.5.0...v2.5.1
 [2.5.0]: https://github.com/cybozu-go/coil/compare/v2.4.0...v2.5.0
 [2.4.0]: https://github.com/cybozu-go/coil/compare/v2.3.0...v2.4.0
 [2.3.0]: https://github.com/cybozu-go/coil/compare/v2.2.0...v2.3.0
diff --git a/v2/kustomization.yaml b/v2/kustomization.yaml
index dd4cbd30..45975700 100644
--- a/v2/kustomization.yaml
+++ b/v2/kustomization.yaml
@@ -1,6 +1,6 @@
 images:
 - name: coil
-  newTag: 2.5.0
+  newTag: 2.5.1
   newName: ghcr.io/cybozu-go/coil
 
 resources:
diff --git a/v2/version.go b/v2/version.go
index 114fd6c5..2edde68b 100644
--- a/v2/version.go
+++ b/v2/version.go
@@ -5,7 +5,7 @@ import (
 	"strings"
 )
 
-const version = "2.5.0"
+const version = "2.5.1"
 
 // Version returns the semantic versioning string of Coil.
 func Version() string {