diff --git a/.github/lockdown.yml b/.github/lockdown.yml
new file mode 100644
index 000000000000..e0ef8504c117
--- /dev/null
+++ b/.github/lockdown.yml
@@ -0,0 +1,8 @@
+# Configuration for Repo Lockdown - https://github.com/dessant/repo-lockdown
+
+skipCreatedBefore: "2020-03-21"
+
+pulls:
+  comment: >
+    This repository does not accept pull requests.
+    Please follow http://llvm.org/docs/Contributing.html#how-to-submit-a-patch for contribution to LLVM.