diff --git a/.github/workflows/code-style.yml b/.github/workflows/code-style.yml
index d47a557..ec6bbe5 100644
--- a/.github/workflows/code-style.yml
+++ b/.github/workflows/code-style.yml
@@ -10,7 +10,7 @@ jobs:
 
         steps:
             -   name: Checkout code
-                uses: actions/checkout@v3
+                uses: actions/checkout@v4
 
             -   name: Check the code style
                 uses: TheDragonCode/codestyler@v3
diff --git a/.github/workflows/phpunit.yml b/.github/workflows/phpunit.yml
index 9a0f1ac..ab27dd6 100644
--- a/.github/workflows/phpunit.yml
+++ b/.github/workflows/phpunit.yml
@@ -12,7 +12,7 @@ jobs:
 
         steps:
             -   name: Checkout code
-                uses: actions/checkout@v3
+                uses: actions/checkout@v4
 
             -   name: Setup PHP
                 uses: shivammathur/setup-php@v2
diff --git a/.github/workflows/update.yml b/.github/workflows/update.yml
index 480a767..f4380ae 100644
--- a/.github/workflows/update.yml
+++ b/.github/workflows/update.yml
@@ -18,7 +18,7 @@ jobs:
 
         steps:
             -   name: Checkout code
-                uses: actions/checkout@v3
+                uses: actions/checkout@v4
 
             -   name: Setup PHP
                 uses: shivammathur/setup-php@v2