diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8822360..ac9d930 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -19,7 +19,7 @@ jobs:
         ruby-version: ["3.1", "3.2", "3.3", "3.4"]
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup Ruby ${{ matrix.ruby-version }}
         uses: ruby/setup-ruby@v1
         with:
@@ -42,7 +42,7 @@ jobs:
     name: Build (github-pages gem)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:
@@ -66,7 +66,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup Ruby ${{ matrix.ruby-version }}
         uses: ruby/setup-ruby@v1
         with:
@@ -99,7 +99,7 @@ jobs:
         node-version: [22.x]
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v5
         with:
diff --git a/.github/workflows/deploy.yml b/.github/workflows/deploy.yml
index f5a7df5..5a55b78 100644
--- a/.github/workflows/deploy.yml
+++ b/.github/workflows/deploy.yml
@@ -30,7 +30,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:
diff --git a/.github/workflows/publish-gem.yml b/.github/workflows/publish-gem.yml
index da99ebe..3c320c8 100644
--- a/.github/workflows/publish-gem.yml
+++ b/.github/workflows/publish-gem.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup Ruby 3.4
         uses: ruby/setup-ruby@v1
         with: