diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 543e993..7753321 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -18,7 +18,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3.6.0
+        uses: actions/checkout@v4.0.0
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/php-cs-fixer.yml b/.github/workflows/php-cs-fixer.yml
index f4547b1..c5dc542 100644
--- a/.github/workflows/php-cs-fixer.yml
+++ b/.github/workflows/php-cs-fixer.yml
@@ -15,7 +15,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3.6.0
+        uses: actions/checkout@v4.0.0
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/publish-subsplits.yml b/.github/workflows/publish-subsplits.yml
index 250a7e3..c0c49dd 100644
--- a/.github/workflows/publish-subsplits.yml
+++ b/.github/workflows/publish-subsplits.yml
@@ -17,7 +17,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3.6.0
+        uses: actions/checkout@v4.0.0
         with:
           fetch-depth: 0
           persist-credentials: false
diff --git a/.github/workflows/static.yml b/.github/workflows/static.yml
index 7fe9b05..0695b9a 100644
--- a/.github/workflows/static.yml
+++ b/.github/workflows/static.yml
@@ -19,7 +19,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3.6.0
+        uses: actions/checkout@v4.0.0
         with:
           fetch-depth: 0