diff --git a/.github/workflows/rebase.yml b/.github/workflows/rebase.yml
index 0c601fd..239e453 100644
--- a/.github/workflows/rebase.yml
+++ b/.github/workflows/rebase.yml
@@ -8,7 +8,7 @@ jobs:
     if: github.event.issue.pull_request != '' && contains(github.event.comment.body, '/rebase')
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
         with:
           token: ${{ secrets.PAT_TOKEN }}
           fetch-depth: 0 # otherwise, you will failed to push refs to dest repo
diff --git a/.github/workflows/sync-release-version.yml b/.github/workflows/sync-release-version.yml
index d3ccd42..929c73e 100644
--- a/.github/workflows/sync-release-version.yml
+++ b/.github/workflows/sync-release-version.yml
@@ -8,7 +8,7 @@ jobs:
   update-version:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
         with:
           fetch-depth: 0
       - name: Run release-tagger
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e0b398d..fa6dfda 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,7 +21,7 @@ jobs:
       github.actor != 'renovate'
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: shellcheck
         uses: reviewdog/action-shellcheck@v1
       - name: Run vercel-wait
diff --git a/.github/workflows/update-readme.yml b/.github/workflows/update-readme.yml
index 5e13d3f..f8fe78d 100644
--- a/.github/workflows/update-readme.yml
+++ b/.github/workflows/update-readme.yml
@@ -9,7 +9,7 @@ jobs:
   sync-assets:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
         with:
           fetch-depth: 0