diff --git a/.github/workflows/depup.yml b/.github/workflows/depup.yml
index 47fbe7e..b91c334 100644
--- a/.github/workflows/depup.yml
+++ b/.github/workflows/depup.yml
@@ -10,7 +10,7 @@ jobs:
   reviewdog:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: reviewdog/action-depup@v1
         id: depup
         with:
diff --git a/.github/workflows/labels.yml b/.github/workflows/labels.yml
index f759750..c6cf3ef 100644
--- a/.github/workflows/labels.yml
+++ b/.github/workflows/labels.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Manage labels
         uses: lannonbr/issue-label-manager-action@4.0.0
         env:
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 53cb536..396c7c0 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -14,7 +14,7 @@ jobs:
     if: github.event.action != 'labeled'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       # Bump version on merging Pull Requests with specific labels.
       # (bump:major,bump:minor,bump:patch)
@@ -58,6 +58,6 @@ jobs:
     if: github.event.action == 'labeled'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Post bumpr status comment
         uses: haya14busa/action-bumpr@v1
diff --git a/.github/workflows/reviewdog.yml b/.github/workflows/reviewdog.yml
index 56a455a..7672645 100644
--- a/.github/workflows/reviewdog.yml
+++ b/.github/workflows/reviewdog.yml
@@ -9,7 +9,7 @@ jobs:
     name: runner / shellcheck
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: haya14busa/action-cond@v1
         id: reporter
         with:
@@ -25,14 +25,14 @@ jobs:
     name: runner / shfmt
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: reviewdog/action-shfmt@v1
 
   actionlint:
     name: runner / actionlint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: reviewdog/action-actionlint@v1
         with:
           reporter: github-check
@@ -42,7 +42,7 @@ jobs:
     name: runner / misspell
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: reviewdog/action-misspell@v1
         with:
           reporter: github-check
@@ -53,7 +53,7 @@ jobs:
     name: runner / alex
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: reviewdog/action-alex@v1
         with:
           reporter: github-check
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 1c7e949..4c288a5 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,7 +9,7 @@ jobs:
     name: runner / prettier (github-check)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./
         with:
           github_token: ${{ secrets.github_token }}
@@ -37,7 +37,7 @@ jobs:
     name: runner / prettier (github-pr-check)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./
         with:
           github_token: ${{ secrets.github_token }}
@@ -65,7 +65,7 @@ jobs:
     name: runner / prettier (github-pr-review)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: ./
         with:
           github_token: ${{ secrets.github_token }}