diff --git a/README.md b/README.md
index 165291794..06a6c3c93 100644
--- a/README.md
+++ b/README.md
@@ -30,7 +30,7 @@ The next example step will deploy `./public` directory to the remote `gh-pages`
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     publish_dir: ./public
@@ -171,7 +171,7 @@ jobs:
         run: hugo --minify
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         # If you're changing the branch from main,
         # also change the `main` in `refs/heads/main`
         # below accordingly.
@@ -201,7 +201,7 @@ A GitHub Actions runner automatically creates a `GITHUB_TOKEN` secret to use in
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     publish_dir: ./public
@@ -215,7 +215,7 @@ Read [Create SSH Deploy Key](#%EF%B8%8F-create-ssh-deploy-key), create your SSH
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     deploy_key: ${{ secrets.ACTIONS_DEPLOY_KEY }}
     publish_dir: ./public
@@ -227,7 +227,7 @@ Read [Create SSH Deploy Key](#%EF%B8%8F-create-ssh-deploy-key), create your SSH
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     personal_token: ${{ secrets.PERSONAL_TOKEN }}
     publish_dir: ./public
@@ -240,7 +240,7 @@ The default is `gh-pages`.
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     publish_branch: your-branch  # default: gh-pages
@@ -253,7 +253,7 @@ Only the contents of this dir are pushed to GitHub Pages branch, `gh-pages` by d
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     publish_dir: ./out  # default: public
@@ -268,7 +268,7 @@ A destination subdirectory on a publishing branch. The default is empty.
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     destination_dir: subdir
@@ -285,7 +285,7 @@ Values should be split with a comma.
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     exclude_assets: '.github,exclude-file1,exclude-file2'
@@ -295,7 +295,7 @@ Set `exclude_assets` to empty for including the `.github` directory to deploymen
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     deploy_key: ${{ secrets.ACTIONS_DEPLOY_KEY }}   # Recommended for this usage
     # personal_token: ${{ secrets.PERSONAL_TOKEN }} # An alternative
@@ -307,7 +307,7 @@ The `exclude_assets` option supports glob patterns.
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     exclude_assets: '.github,exclude-file.txt,exclude-dir/**.txt'
@@ -322,7 +322,7 @@ For more details about the `CNAME` file, read the official documentation: [Manag
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     publish_dir: ./public
@@ -340,7 +340,7 @@ Bypassing Jekyll makes the deployment faster and is necessary if you are deployi
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     publish_dir: ./public
@@ -357,7 +357,7 @@ For example:
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     publish_dir: ./public
@@ -377,7 +377,7 @@ For example:
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     publish_dir: ./public
@@ -396,7 +396,7 @@ For example:
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     deploy_key: ${{ secrets.ACTIONS_DEPLOY_KEY }}
     external_repository: username/external-repository
@@ -423,7 +423,7 @@ This allows you to make your publish branch with only the latest commit.
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     publish_dir: ./public
@@ -437,7 +437,7 @@ A commit is always created with the same user.
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     publish_dir: ./public
@@ -454,7 +454,7 @@ When we create a commit with a message `docs: Update some post`, a deployment co
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     publish_dir: ./public
@@ -468,7 +468,7 @@ use the `full_commit_message` option instead of the `commit_message` option.
 
 ```yaml
 - name: Deploy
-  uses: peaceiris/actions-gh-pages@v3
+  uses: peaceiris/actions-gh-pages@v4
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     publish_dir: ./public
@@ -508,7 +508,7 @@ jobs:
           echo "DEPLOY_TAG_NAME=deploy-${TAG_NAME}" >> "${GITHUB_OUTPUT}"
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           publish_dir: ./public
@@ -666,7 +666,7 @@ Our project builds and provides build assets only when creating a release. This
 In this project, a major tag (e.g. v3) is guaranteed to contain no breaking changes. But, we recommend using a tag or a commit hash for the stability of your workflows.
 
 ```yaml
-- uses: peaceiris/actions-gh-pages@v3.9.3 # tag: Better
+- uses: peaceiris/actions-gh-pages@v4.0.0 # tag: Better
   with:
     github_token: ${{ secrets.GITHUB_TOKEN }}
     publish_dir: ./public
@@ -751,7 +751,7 @@ jobs:
       - run: npm run build
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: github.ref == 'refs/heads/main'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -803,7 +803,7 @@ jobs:
       - run: npm run build
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: github.ref == 'refs/heads/main'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -858,7 +858,7 @@ jobs:
       - run: yarn export
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: github.ref == 'refs/heads/main'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -911,7 +911,7 @@ jobs:
       - run: npm run generate
 
       - name: deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: github.ref == 'refs/heads/main'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -972,7 +972,7 @@ jobs:
       - run: yarn build
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: github.ref == 'refs/heads/main'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -1036,7 +1036,7 @@ jobs:
       - run: mkdocs build
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: github.ref == 'refs/heads/main'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -1079,7 +1079,7 @@ jobs:
       - run: mdbook build
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: github.ref == 'refs/heads/main'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -1129,7 +1129,7 @@ jobs:
         run: flutter build web
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: github.ref == 'refs/heads/main'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -1180,7 +1180,7 @@ jobs:
         # provide --output=<output-file> option for `elm make` and remove this step
 
       - name: Deploy
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: github.ref == 'refs/heads/main'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
@@ -1233,7 +1233,7 @@ jobs:
       - run: publish-cli generate
 
       - name: Deploy to GitHub Pages
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@v4
         if: github.ref == 'refs/heads/main'
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}