diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 00000000..2c48305b
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    groups:
+      github-actions:
+        patterns: ["*"]
+    schedule:
+      interval: "weekly"
+    cooldown:
+      default-days: 7
diff --git a/.github/workflows/deploy-on-push.yml b/.github/workflows/deploy-on-push.yml
index 05e44776..6b902d90 100644
--- a/.github/workflows/deploy-on-push.yml
+++ b/.github/workflows/deploy-on-push.yml
@@ -10,8 +10,8 @@ jobs:
     name: Deploy to GitHub Pages
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v2
+      - uses: actions/checkout@0717577d45739eb3c851188b29f50ed6c0b2194e # v2.8.0
+      - uses: actions/setup-node@7c12f8017d5436eb855f1ed4399f037a36fbd9e8 # v2.5.2
         with:
           node-version: 18
           cache: npm
@@ -25,7 +25,7 @@ jobs:
       # Popular action to deploy to GitHub Pages:
       # Docs: https://github.com/peaceiris/actions-gh-pages#%EF%B8%8F-docusaurus
       - name: Deploy to GitHub Pages
-        uses: peaceiris/actions-gh-pages@v3
+        uses: peaceiris/actions-gh-pages@373f7f263a76c20808c831209c920827a82a2847 # v3.9.3
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           # Build output to publish to the `gh-pages` branch:
diff --git a/.github/workflows/test-deploy-on-pull.yml b/.github/workflows/test-deploy-on-pull.yml
index e1b21e31..0661d89a 100644
--- a/.github/workflows/test-deploy-on-pull.yml
+++ b/.github/workflows/test-deploy-on-pull.yml
@@ -12,8 +12,8 @@ jobs:
     name: Test deployment
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
-      - uses: actions/setup-node@v3
+      - uses: actions/checkout@0717577d45739eb3c851188b29f50ed6c0b2194e # v2.8.0
+      - uses: actions/setup-node@3235b876344d2a9aa001b8d1453c930bba69e610 # v3.9.1
         with:
           node-version: 18
           cache: npm