diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 28c24b0f..5aaeca21 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
         name: Coding Standards
         steps:
             - name: Checkout
-              uses: actions/checkout@v4
+              uses: actions/checkout@v5
 
             - name: Setup PHP
               uses: shivammathur/setup-php@v2
@@ -26,7 +26,7 @@ jobs:
         name: Static Analysis
         steps:
             -   name: Checkout
-                uses: actions/checkout@v4
+                uses: actions/checkout@v5
 
             - name: Setup PHP
               uses: shivammathur/setup-php@v2
@@ -55,7 +55,7 @@ jobs:
         name: PHP ${{ matrix.php-versions }} Test on ubuntu-latest
         steps:
             - name: Checkout
-              uses: actions/checkout@v4
+              uses: actions/checkout@v5
 
             - name: Setup PHP
               uses: shivammathur/setup-php@v2
@@ -78,7 +78,7 @@ jobs:
         name: PHP ${{ matrix.php-versions }} Test dev dependencies on ubuntu-latest
         steps:
             - name: Checkout
-              uses: actions/checkout@v4
+              uses: actions/checkout@v5
 
             - name: Setup PHP
               uses: shivammathur/setup-php@v2
@@ -100,7 +100,7 @@ jobs:
         name: PHP 8.5 (lowest) Test on ubuntu-latest
         steps:
             - name: Checkout
-              uses: actions/checkout@v4
+              uses: actions/checkout@v5
 
             - name: Setup PHP
               uses: shivammathur/setup-php@v2
@@ -126,7 +126,7 @@ jobs:
             SKIP_FIREFOX: 1
         steps:
             - name: Checkout
-              uses: actions/checkout@v4
+              uses: actions/checkout@v5
 
             - name: Setup PHP
               uses: shivammathur/setup-php@v2
@@ -145,7 +145,7 @@ jobs:
         name: PHP 8.5 Test on macos-latest
         steps:
             - name: Checkout
-              uses: actions/checkout@v4
+              uses: actions/checkout@v5
 
             - name: Setup PHP
               uses: shivammathur/setup-php@v2
@@ -174,7 +174,7 @@ jobs:
       name: PHP ${{ matrix.php-versions }} (PHPUnit 10) Test on ubuntu-latest
       steps:
         - name: Checkout
-          uses: actions/checkout@v4
+          uses: actions/checkout@v5
 
         - name: Setup PHP
           uses: shivammathur/setup-php@v2