diff --git a/.github/workflows/gh-pages.yml b/.github/workflows/gh-pages.yml
index 6c0382b..062abd8 100644
--- a/.github/workflows/gh-pages.yml
+++ b/.github/workflows/gh-pages.yml
@@ -23,12 +23,12 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Delete existing JSON files
         if: github.event.inputs.recreate-json
         run: rm -rf gh-pages/public/data/versions
       - name: Setup Node.js
-        uses: actions/setup-node@v4
+        uses: actions/setup-node@v6
         with:
           node-version: 22
           cache: npm
@@ -45,7 +45,7 @@ jobs:
       - name: Setup Pages
         uses: actions/configure-pages@v5
       - name: Upload artifact
-        uses: actions/upload-pages-artifact@v3
+        uses: actions/upload-pages-artifact@v4
         with:
           path: gh-pages/dist
       - name: Deploy to GitHub Pages
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index efaeb4c..8758e88 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -31,7 +31,7 @@ jobs:
           coverage: none
       -
         name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       -
         name: Check PHP coding style
         run: php-cs-fixer fix --config=./.php-cs-fixer.dist.php --dry-run --using-cache=no --diff --show-progress=dots --verbose --no-interaction --ansi
@@ -55,7 +55,7 @@ jobs:
           coverage: none
       -
         name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       -
         name: Check PHP syntax
         uses: mlocati/check-php-syntax@v1
@@ -109,7 +109,7 @@ jobs:
           coverage: none
       -
         name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       -
         name: Install Composer dependencies
         run: composer update --no-progress --no-suggest --optimize-autoloader --ansi --no-interaction
@@ -135,7 +135,7 @@ jobs:
           coverage: none
       -
         name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       -
         name: Build CLDR data
         run: php ./bin/import-cldr-data ${{ env.BUILD_CLDR_VERSION }}