diff --git a/.github/workflows/helm-release.yaml b/.github/workflows/helm-release.yaml
index 01ee13b..b65a7f0 100644
--- a/.github/workflows/helm-release.yaml
+++ b/.github/workflows/helm-release.yaml
@@ -1,6 +1,12 @@
 name: Release Charts
 
-on: workflow_dispatch
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'charts/**'
+      - '!**.md'
 
 jobs:
   release:
diff --git a/.github/workflows/helm.yaml b/.github/workflows/helm.yaml
index f51ca6d..e4581ae 100644
--- a/.github/workflows/helm.yaml
+++ b/.github/workflows/helm.yaml
@@ -4,6 +4,7 @@ on:
   pull_request:
     paths:
       - "charts/**"
+      - '!**.md'
 
 jobs:
   lint-test:
diff --git a/charts/accurate/README.md b/charts/accurate/README.md
index f73602f..bd40f35 100644
--- a/charts/accurate/README.md
+++ b/charts/accurate/README.md
@@ -90,8 +90,4 @@ This will prevent the Accurate version from going up just by modifying the Helm
 You must change the version of `Chart.yaml` when making changes to the Helm Chart.
 CI fails with lint error when creating a Pull Request without changing the version of `Chart.yaml`.
 
-When you release the Helm Chart, manually run the GitHub Actions workflow for the release.
-
-https://github.com/cybozu-go/accurate/actions/workflows/helm-release.yaml
-
-When you run workflow, [helm/chart-releaser-action](https://github.com/helm/chart-releaser-action) will automatically create a GitHub Release.
+When a pull request with Chart changes is merged into the main branch, [helm/chart-releaser-action](https://github.com/helm/chart-releaser-action) will automatically create a GitHub release.