diff --git a/.github/workflows/dockerimage.yml b/.github/workflows/dockerimage.yml
index 3f94a80..0402ca9 100644
--- a/.github/workflows/dockerimage.yml
+++ b/.github/workflows/dockerimage.yml
@@ -8,6 +8,6 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - name: Build the Docker image
       run: docker build . --file Dockerfile --tag ${{ github.repository }}:$(date +%s)
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 1bce65b..df55250 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)
@@ -55,6 +55,6 @@ 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 4e0b141..edb4bec 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:
@@ -26,7 +26,7 @@ jobs:
     name: runner / hadolint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: haya14busa/action-cond@v1
         id: reporter
         with:
@@ -43,7 +43,7 @@ jobs:
     name: runner / misspell
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: reviewdog/action-misspell@v1
         with:
           github_token: ${{ secrets.github_token }}
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index f86ad40..3c5e36d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -6,7 +6,7 @@ jobs:
   test-tools:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: jiro4989/setup-nim-action@v1
       - run: |
           cd tools
@@ -15,7 +15,7 @@ jobs:
   test-script:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: |
           mkdir -p .rpmpkg/usr/bin
           mkdir -p .rpmpkg/usr/lib/testbin
@@ -42,7 +42,7 @@ jobs:
   test-script-version:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: |
           mkdir -p .rpmpkg/usr/bin
           mkdir -p .rpmpkg/usr/lib/testbin
@@ -65,7 +65,7 @@ jobs:
   test-github-refs-version:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: |
           mkdir -p .rpmpkg/usr/bin
           mkdir -p .rpmpkg/usr/lib/testbin