diff --git a/.github/workflows/lockdown.yml b/.github/workflows/lockdown.yml
new file mode 100644
index 0000000000..7dc424ed9e
--- /dev/null
+++ b/.github/workflows/lockdown.yml
@@ -0,0 +1,15 @@
+- name: 'Lock down mirror repository'
+
+on:
+  issues:
+    types: opened
+  pull_request:
+    types: opened
+
+jobs:
+  lockdown:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: dessant/repo-lockdown@v2
+        with:
+          github-token: ${{ github.token }}