diff --git a/.github/workflows/macos.yml b/.github/workflows/macos.yml
index 411cdf8f..ae8e5e7e 100644
--- a/.github/workflows/macos.yml
+++ b/.github/workflows/macos.yml
@@ -28,7 +28,7 @@ jobs:
         git config --global core.autocrlf false
         git config --global core.eol lf
         git config --global advice.detachedHead 0
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Ruby
       uses: ruby/setup-ruby@v1
       with:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 8e379ac6..8dc76321 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Extract release note
         run: |
           ruby \
@@ -40,7 +40,7 @@ jobs:
           - ruby
           - jruby
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
diff --git a/.github/workflows/sync-ruby.yml b/.github/workflows/sync-ruby.yml
index 29c43449..78e94eb9 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/ubuntu.yml b/.github/workflows/ubuntu.yml
index 331e439a..3f93d30b 100644
--- a/.github/workflows/ubuntu.yml
+++ b/.github/workflows/ubuntu.yml
@@ -28,7 +28,7 @@ jobs:
         git config --global core.autocrlf false
         git config --global core.eol lf
         git config --global advice.detachedHead 0
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: actions/setup-java@v5
       with:
         distribution: zulu
diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 6175e625..5aeba972 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -29,7 +29,7 @@ jobs:
         git config --global core.autocrlf false
         git config --global core.eol lf
         git config --global advice.detachedHead 0
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: actions/setup-java@v5
       with:
         distribution: zulu