diff --git a/CHANGELOG.md b/CHANGELOG.md
index 22d0bd8a..c601d6ae 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+## [3.1.2] - 2024-07-18
+
 ### Changed
 
 - Update dependencies in [#283](https://github.com/cybozu-go/sabakan/pull/283)
@@ -329,7 +331,8 @@ No changes.  Only for updating Docker base image.
 
 See [CHANGELOG-0](./CHANGELOG-0.md).
 
-[Unreleased]: https://github.com/cybozu-go/sabakan/compare/v3.1.1...HEAD
+[Unreleased]: https://github.com/cybozu-go/sabakan/compare/v3.1.2...HEAD
+[3.1.2]: https://github.com/cybozu-go/sabakan/compare/v3.1.1...v3.1.2
 [3.1.1]: https://github.com/cybozu-go/sabakan/compare/v3.1.0...v3.1.1
 [3.1.0]: https://github.com/cybozu-go/sabakan/compare/v3.0.0...v3.1.0
 [3.0.0]: https://github.com/cybozu-go/sabakan/compare/v2.13.2...v3.0.0
diff --git a/version.go b/version.go
index b90e33c5..1b8a81e7 100644
--- a/version.go
+++ b/version.go
@@ -1,7 +1,7 @@
 package sabakan
 
 // Version is sabakan version
-const Version = "3.1.1"
+const Version = "3.1.2"
 
 // SchemaVersion is the schema version
 const SchemaVersion = "3"