diff --git a/.github/workflows/benchmark.yml b/.github/workflows/benchmark.yml
index a0b3331..cb51209 100644
--- a/.github/workflows/benchmark.yml
+++ b/.github/workflows/benchmark.yml
@@ -20,7 +20,7 @@ jobs:
           - ref: ${{ github.head_ref }}
             name: head
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: ${{ matrix.ref }}
       - uses: ruby/setup-ruby@v1
diff --git a/.github/workflows/generator.yml b/.github/workflows/generator.yml
index 4dcc01b..952ffa3 100644
--- a/.github/workflows/generator.yml
+++ b/.github/workflows/generator.yml
@@ -11,7 +11,7 @@ jobs:
     outputs:
       latest-commit-author: ${{ steps.commit_author.outputs.author }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           ref: ${{ github.head_ref }}
       - id: commit_author
@@ -22,7 +22,7 @@ jobs:
     if: needs.get_latest_commit_author.outputs.latest-commit-author != 'github-actions[bot]'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           submodules: true
           ref: ${{ github.head_ref }}
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 9c15168..0c6d87c 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -7,7 +7,7 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: "3.2"
diff --git a/.github/workflows/ubuntu-test.yml b/.github/workflows/ubuntu-test.yml
index 8927ad8..2cacf7f 100644
--- a/.github/workflows/ubuntu-test.yml
+++ b/.github/workflows/ubuntu-test.yml
@@ -17,7 +17,7 @@ jobs:
         # Due to https://github.com/actions/runner/issues/849, we have to use quotes for '3.0'
         ruby: ["2.5", "2.6", "2.7", "3.0", "3.1", "3.2"]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}
diff --git a/.github/workflows/windows-test.yml b/.github/workflows/windows-test.yml
index 10761da..4d907d5 100644
--- a/.github/workflows/windows-test.yml
+++ b/.github/workflows/windows-test.yml
@@ -17,7 +17,7 @@ jobs:
         # Due to https://github.com/actions/runner/issues/849, we have to use quotes for '3.0'
         ruby: ["2.5", "2.6", "2.7", "3.0", "3.1", "3.2"]
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: ${{ matrix.ruby }}