diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index fd324cd..c17ae3d 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -13,7 +13,7 @@ jobs:
     name: ShellCheck
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Run shellcheck
         run: shellcheck entrypoint.sh
 
@@ -21,7 +21,7 @@ jobs:
     name: actionlint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Install and run actionlint
         run: |
           bash <(curl -fsSL https://raw.githubusercontent.com/rhysd/actionlint/main/scripts/download-actionlint.bash)
@@ -33,7 +33,7 @@ jobs:
     name: Unit tests (bats)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
       - name: Install bats
         run: npm install -g bats
       - name: Run tests
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e59b7e8..07edc6c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,7 +21,7 @@ jobs:
     name: upload → finalize
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Check for required secrets
         id: guard