diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..9cbb9b7
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,8 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
+    cooldown:
+      default-days: 7
diff --git a/.github/workflows/semgrep.yml b/.github/workflows/semgrep.yml
index e784c86..23dfa99 100644
--- a/.github/workflows/semgrep.yml
+++ b/.github/workflows/semgrep.yml
@@ -11,6 +11,9 @@ on:
   # random HH:MM to avoid a load spike on GitHub Actions at 00:00
   - cron: 25 0 * * *
 name: Semgrep
+permissions:
+  contents: read
+
 jobs:
   semgrep:
     name: semgrep/ci
@@ -20,5 +23,10 @@ jobs:
     container:
       image: returntocorp/semgrep
     steps:
-    - uses: actions/checkout@v4
+    - name: Harden the runner (Audit all outbound calls)
+      uses: step-security/harden-runner@b09bb98e06d4d774595224525879c09bc6e98c40 # v2.20.1
+      with:
+        egress-policy: audit
+
+    - uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
     - run: semgrep ci