diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a3d47f8..bcb1125 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
     name: docker compose config (syntax)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Validate docker-compose.yml syntax
         run: |
@@ -26,7 +26,7 @@ jobs:
     name: markdown lint
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Lint Markdown files
         uses: DavidAnson/markdownlint-cli2-action@v16
@@ -50,7 +50,7 @@ jobs:
     name: shellcheck
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Run shellcheck on scripts/
         uses: ludeeus/action-shellcheck@2.0.0