diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9115790..c882fdc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,8 +5,9 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
-### Added
-### Changed
-### Removed
+## [0.1.0] - 2022-02-10
 
-[Unreleased]: https://github.com/cybozu-go/neco-template/compare/4b825dc642cb6eb9a060e54bf8d69288fbee4904...HEAD
+This is the first public release.
+
+[Unreleased]: https://github.com/cybozu-go/cattage/compare/v0.1.0...HEAD
+[0.1.0]: https://github.com/cybozu-go/cattage/compare/60bcea7b1cf9d79e5e439d0fa7dbb4629c9f1125...v0.1.0
diff --git a/docs/release.md b/docs/release.md
index aae10a9..b4f80c6 100644
--- a/docs/release.md
+++ b/docs/release.md
@@ -34,19 +34,20 @@ It should look like:
 2. Make a branch to release
 
     ```console
-    $ git neco dev "$VERSION"`
+    $ git neco dev "bump-$VERSION"`
     ```
 
-3. Edit `CHANGELOG.md` for the new version ([example][]).
-4. Commit the change and push it.
+3. Update version strings in `version.go` in the top directory.
+4. Edit `CHANGELOG.md` for the new version ([example][]).
+5. Commit the change and push it.
 
     ```console
     $ git commit -a -m "Bump version to $VERSION"
     $ git neco review
     ```
 
-5. Merge this branch.
-6. Add a git tag to the main HEAD, then push it.
+6. Merge this branch.
+7. Add a git tag to the main HEAD, then push it.
 
     ```console
     $ git checkout main
@@ -58,5 +59,37 @@ It should look like:
 GitHub actions will build and push artifacts such as container images and
 create a new GitHub release.
 
+## Release Helm Chart
+
+Cattage Helm Chart will be released independently of Cattage itself.
+This will prevent the Cattage version from going up just by modifying the Helm Chart.
+
+1. Determine a new version number of the chart. This version is not related to the version of Cattage. Let it write `$VERSION` as `VERSION=x.y.z`.
+2. Make a branch to release
+
+    ```console
+    $ git neco dev "bump-chart-$VERSION"`
+    ```
+
+3. Change the version of `Chart.yaml`.
+4. Commit the change and push it.
+
+    ```console
+    $ git commit -a -m "Bump chart version to $VERSION"
+    $ git neco review
+    ```
+
+5. Merge this branch.
+6. Add a git tag to the main HEAD, then push it.
+
+    ```console
+    $ git checkout main
+    $ git pull
+    $ git tag -a -m "Release Chart v$VERSION" "chart-v$VERSION"
+    $ git push origin "chart-v$VERSION"
+    ```
+
+GitHub actions will upload the chart archive on `gh-pages` branch.
+
 [semver]: https://semver.org/spec/v2.0.0.html
 [example]: https://github.com/cybozu-go/etcdpasswd/commit/77d95384ac6c97e7f48281eaf23cb94f68867f79