diff --git a/.github/workflows/policy.yaml b/.github/workflows/policy.yaml
index 0794aca..17d2ad0 100644
--- a/.github/workflows/policy.yaml
+++ b/.github/workflows/policy.yaml
@@ -16,7 +16,7 @@ jobs:
     name: Check merge commits
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
     - run: |
@@ -34,7 +34,7 @@ jobs:
     name: Check commit message style
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
     - uses: actions/setup-node@v6
@@ -48,7 +48,7 @@ jobs:
     name: Check markdown style
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         fetch-depth: 0
     - uses: actions/setup-node@v6
@@ -60,7 +60,7 @@ jobs:
     name: Check YAML style
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: actions/setup-python@v6
       with:
         python-version: "3.10"
diff --git a/.github/workflows/publish.yaml b/.github/workflows/publish.yaml
index 3e02c14..ea250fd 100644
--- a/.github/workflows/publish.yaml
+++ b/.github/workflows/publish.yaml
@@ -9,7 +9,7 @@ jobs:
     name: Publish to RubyGems
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: "3.1"
diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 57fda0f..83f7443 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -17,7 +17,7 @@ jobs:
         - "3.1"
         - "3.0"
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: ruby/setup-ruby@v1
       with:
         ruby-version: ${{ matrix.ruby }}