diff --git a/.github/workflows/codeql-analysis.yml b/.github/workflows/codeql-analysis.yml
index a49ec104..67154edc 100644
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -38,7 +38,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v3 # tag=v3
+      uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index ed89961d..ea135010 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -8,7 +8,7 @@ jobs:
     name: release
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - uses: actions/setup-node@v3
         with:
           node-version: lts/*
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f1cfbe7d..b5a39ae6 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,7 +16,7 @@ jobs:
           - 18
           - 20
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Use Node.js ${{ matrix.node_version }}
         uses: actions/setup-node@v3
         with:
@@ -34,7 +34,7 @@ jobs:
     steps:
       - run: exit 1
         if: ${{ needs.test_matrix.result != 'success' }}
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - run: npm ci
       - run: npm run lint
     if: ${{ always() }}
diff --git a/.github/workflows/update-prettier.yml b/.github/workflows/update-prettier.yml
index a224dbcf..c22c1c8e 100644
--- a/.github/workflows/update-prettier.yml
+++ b/.github/workflows/update-prettier.yml
@@ -7,7 +7,7 @@ jobs:
   update_prettier:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - uses: actions/setup-node@v3
         with:
           cache: npm