diff --git a/.github/workflows/codeql.yml b/.github/workflows/codeql.yml
new file mode 100644
index 0000000..33057b5
--- /dev/null
+++ b/.github/workflows/codeql.yml
@@ -0,0 +1,36 @@
+name: CodeQL
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    - cron: "23 4 * * 1" # Monday 4:23 UTC (12:23 AWST)
+
+permissions:
+  contents: read
+  security-events: write
+
+jobs:
+  analyze:
+    name: Analyze (Go)
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
+
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@c10b8064de6f491fea524254123dbe5e09572f13 # v4
+        with:
+          languages: go
+          build-mode: autobuild
+          queries: security-extended
+          dependency-caching: true
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@c10b8064de6f491fea524254123dbe5e09572f13 # v4
+        with:
+          category: "/language:go"