diff --git a/.github/workflows/composer-normalize.yml b/.github/workflows/composer-normalize.yml
index 918a29b..93e4d80 100644
--- a/.github/workflows/composer-normalize.yml
+++ b/.github/workflows/composer-normalize.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Git checkout
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v4.2.1
 
       - name: Validate Composer configuration
         run: composer validate --strict
diff --git a/.github/workflows/markdown-normalize.yml b/.github/workflows/markdown-normalize.yml
index effabdb..8c0265a 100644
--- a/.github/workflows/markdown-normalize.yml
+++ b/.github/workflows/markdown-normalize.yml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Git checkout
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v4.2.1
 
       - name: Prettify markdown
         uses: creyD/prettier_action@v4.0
diff --git a/.github/workflows/tests_go.yml b/.github/workflows/tests_go.yml
index 45838a3..c87152b 100644
--- a/.github/workflows/tests_go.yml
+++ b/.github/workflows/tests_go.yml
@@ -12,6 +12,6 @@ jobs:
         with:
           go-version: ${{ matrix.go-version }}
       - name: Checkout code
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v4.2.1
       - name: Test
         run: go test src/go/t1
diff --git a/.github/workflows/tests_php.yml b/.github/workflows/tests_php.yml
index 3073364..27027ae 100644
--- a/.github/workflows/tests_php.yml
+++ b/.github/workflows/tests_php.yml
@@ -10,7 +10,7 @@ jobs:
     name: P${{ matrix.php }} - ${{ matrix.dependency-version }}
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2.3.4
+        uses: actions/checkout@v4.2.1
 
       - name: Setup PHP
         uses: shivammathur/setup-php@2.11.0