diff --git a/README.md b/README.md
index 9870215..0848ec3 100644
--- a/README.md
+++ b/README.md
@@ -82,3 +82,5 @@ git commit -m "b2 c2"
 git push origin conflict_branch_2
 git push origin conflict_branch_1
 ```
+
+- branch protection rules: need PR + Approval