diff --git a/.github/workflows/sync-ruby.yml b/.github/workflows/sync-ruby.yml
index 29c4344..78e94eb 100644
--- a/.github/workflows/sync-ruby.yml
+++ b/.github/workflows/sync-ruby.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     if: ${{ github.repository_owner == 'ruby' }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
 
       - name: Create GitHub App token
         id: app-token
diff --git a/.github/workflows/test-jruby.yml b/.github/workflows/test-jruby.yml
index 98917a9..1901120 100644
--- a/.github/workflows/test-jruby.yml
+++ b/.github/workflows/test-jruby.yml
@@ -11,7 +11,7 @@ jobs:
         os: [ ubuntu-latest, macos-latest ]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0fa2c00..5ed1cdf 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -18,7 +18,7 @@ jobs:
         os: [ ubuntu-latest, macos-latest ]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with: