diff --git a/.github/workflows/actionlint.yml b/.github/workflows/actionlint.yml
new file mode 100644
index 000000000..20152dc0a
--- /dev/null
+++ b/.github/workflows/actionlint.yml
@@ -0,0 +1,26 @@
+name: actionlint
+
+on:
+  workflow_dispatch:
+  pull_request:
+    paths:
+      - '.github/workflows/**'
+  push:
+    branches: [main]
+    paths:
+      - '.github/workflows/**'
+
+permissions:
+  contents: read
+
+jobs:
+  actionlint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Install and run actionlint
+        shell: bash
+        run: |
+          bash <(curl --proto '=https' --tlsv1.2 -sSf \
+            https://raw.githubusercontent.com/rhysd/actionlint/v1.7.7/scripts/download-actionlint.bash)
+          ./actionlint -color
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
index 8a8026c1c..a7bbc7c40 100644
--- a/.github/workflows/codeql.yml
+++ b/.github/workflows/codeql.yml
@@ -27,6 +27,8 @@ jobs:
           build-mode: manual
         - language: java-kotlin
           build-mode: manual
+        - language: actions
+          build-mode: none
     steps:
     - name: Checkout repository
       uses: actions/checkout@v4
@@ -63,6 +65,7 @@ jobs:
       with:
         languages: ${{ matrix.language }}
         build-mode: ${{ matrix.build-mode }}
+        queries: security-extended
 
     - name: Build C runtime (manual c-cpp)
       if: matrix.language == 'c-cpp'