diff --git a/.github/workflows/changelog.yaml b/.github/workflows/changelog.yaml
index de6ee87..d8def2e 100644
--- a/.github/workflows/changelog.yaml
+++ b/.github/workflows/changelog.yaml
@@ -22,7 +22,7 @@ jobs:
     timeout-minutes: 3
     
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
 
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2068a89..6b0c7e8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -26,7 +26,7 @@ jobs:
     timeout-minutes: 3
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
         # https://bundler.io/blog/2018/01/17/making-gem-development-a-little-better.html
       - run: rm Gemfile.lock
@@ -51,7 +51,7 @@ jobs:
           - macos
           - windows
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: ruby/setup-ruby@v1
         with:
@@ -73,7 +73,7 @@ jobs:
           - macos
           - windows
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: ruby/setup-ruby@v1
         with:
diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 6862953..b2f8b28 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -26,7 +26,7 @@ jobs:
     timeout-minutes: 3
     
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
         # https://bundler.io/blog/2018/01/17/making-gem-development-a-little-better.html
       - run: rm Gemfile.lock
@@ -68,7 +68,7 @@ jobs:
     timeout-minutes: 3
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/download-artifact@v4
         with:
diff --git a/.github/workflows/gem.yml b/.github/workflows/gem.yml
index db41561..ecb261e 100644
--- a/.github/workflows/gem.yml
+++ b/.github/workflows/gem.yml
@@ -26,7 +26,7 @@ jobs:
           - x86_64-linux
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
         # https://bundler.io/blog/2018/01/17/making-gem-development-a-little-better.html
       - run: rm Gemfile.lock
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index cc4d453..43259ca 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Install Ruby and gems
         uses: ruby/setup-ruby@v1