diff --git a/.github/workflows/actionlint.yml b/.github/workflows/actionlint.yml
new file mode 100644
index 0000000..8dd1596
--- /dev/null
+++ b/.github/workflows/actionlint.yml
@@ -0,0 +1,16 @@
+name: Lint GitHub Actions workflows
+
+on:
+  pull_request:
+    paths:
+      - .github/workflows/*.yml
+
+jobs:
+  actionlint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Check workflow files
+        uses: reviewdog/action-actionlint@v1
diff --git a/.github/workflows/gh-deploy.yml b/.github/workflows/gh-deploy.yml
index 9aea5b6..7db889c 100644
--- a/.github/workflows/gh-deploy.yml
+++ b/.github/workflows/gh-deploy.yml
@@ -33,12 +33,13 @@ jobs:
         uses: ./.github/actions/setup-python-with-uv
 
       - name: Generate cache id
-        run: echo "cache_id=$(date --utc '+%V')" >> $GITHUB_ENV
+        id: cache
+        run: echo "id=$(date --utc '+%V')" >> "$GITHUB_OUTPUT"
 
       - name: Save cache
         uses: actions/cache@v5
         with:
-          key: mkdocs-material-${{ env.cache_id }}
+          key: mkdocs-material-${{ steps.cache.outputs.id }}
           path: .cache
           restore-keys: mkdocs-material-
 
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index b76b7d5..f2b3c89 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -52,6 +52,11 @@ repos:
         language: python
         types: [python]
 
+  - repo: https://github.com/rhysd/actionlint
+    rev: v1.7.10
+    hooks:
+      - id: actionlint
+
   - repo: https://github.com/hadolint/hadolint
     rev: v2.12.0
     hooks: