diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..11fc565
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,18 @@
+version: 2
+updates:
+  - package-ecosystem: uv
+    directory: /
+    schedule:
+      interval: weekly
+    cooldown:
+      default-days: 7
+    groups:
+      minor-and-patch:
+        update-types: [minor, patch]
+
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
+    cooldown:
+      default-days: 7
diff --git a/.github/workflows/semgrep.yml b/.github/workflows/semgrep.yml
new file mode 100644
index 0000000..98c03a0
--- /dev/null
+++ b/.github/workflows/semgrep.yml
@@ -0,0 +1,36 @@
+name: Semgrep
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+  schedule:
+    - cron: '17 6 * * 1'
+
+permissions:
+  actions: read
+  contents: read
+  security-events: write
+
+jobs:
+  scan:
+    runs-on: ubuntu-latest
+    container:
+      image: semgrep/semgrep:1.176.1@sha256:34ab619bf1391a24bfda3f05debd0d8a6ce3093c2d5f9d39cfc00f83c1397823
+    steps:
+      - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4
+
+      - name: Semgrep scan
+        run: >
+          semgrep scan
+          --config p/default
+          --config p/python
+          --config p/secrets
+          --config p/github-actions
+          --sarif --output semgrep.sarif
+
+      - name: Upload SARIF to code scanning
+        if: always()
+        uses: github/codeql-action/upload-sarif@b96794f015dfd88f77b49b1c93e0fa7110f94c63 # v4
+        with:
+          sarif_file: semgrep.sarif