diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 2755192a..20ff87e7 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Extract release note
         run: |
           ruby \
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0e7df009..a96885a6 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -25,7 +25,7 @@ jobs:
         #   - runs-on: ubuntu-latest
         #     ruby-version: truffleruby
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby-version }}
@@ -47,7 +47,7 @@ jobs:
           - "3.0"
           - head
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby-version }}
@@ -65,7 +65,7 @@ jobs:
     name: "Document"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: 2.7
@@ -75,7 +75,7 @@ jobs:
       - name: Build document
         run: |
           bundle exec rake warning:error rdoc
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         if: |
           github.event_name == 'push'
         with: