diff --git a/.github/actions/do-codeql/action.yml b/.github/actions/do-codeql/action.yml
new file mode 100644
index 0000000..334fb8c
--- /dev/null
+++ b/.github/actions/do-codeql/action.yml
@@ -0,0 +1,22 @@
+inputs:
+  language:
+    description: Language to scan
+    required: true
+description: Do a CodeQL scan
+name: CodeQL
+runs:
+  using: composite
+  steps:
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v2
+      with:
+        languages: ${{ inputs.language }}
+        queries: +security-and-quality
+
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v2
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v2
+      with:
+        category: "/language:${{ inputs.language }}"
diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 0000000..0f3b923
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,38 @@
+name: CodeQL
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+    paths:
+      - ".github/workflows/codeql.yml"
+      - "**.ts"
+      - "**.js"
+      - "**.mts"
+      - "**.mjs"
+      - "**.tsx"
+      - "**.jsx"
+      - "**.json"
+  schedule:
+    - cron: "2 11 * * 0"
+
+jobs:
+  analyse:
+    name: Analyse
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Run
+        uses: ./.github/actions/do-codeql
+        with:
+          language: javascript