diff --git a/admin-safe-settings/settings.yml b/admin-safe-settings/settings.yml
index 0dd798d..6926104 100644
--- a/admin-safe-settings/settings.yml
+++ b/admin-safe-settings/settings.yml
@@ -1,3 +1,16 @@
 repository:
   topics:
     - safe-settings
+
+rulesets:
+  - name: Prevent destruction of the default branch
+    target: branch
+    enforcement: active
+    conditions:
+      ref_name:
+        include:
+          - ~DEFAULT_BRANCH
+        exclude: []
+    rules:
+      - type: deletion
+      - type: non_fast_forward