diff --git a/.mergify.yml b/.mergify.yml
index b17e17ca2..e384858d2 100644
--- a/.mergify.yml
+++ b/.mergify.yml
@@ -8,5 +8,13 @@ pull_request_rules:
         title: "[4.2.x] {{ title }} (backport #{{ number }})"
         branches:
           - stable/4.2.x
-        assignees:
-          - "{{ author }}"
+
+  - name: backport patches to stable/4.3.x
+    conditions:
+      - base=main
+      - label=backport-to-4.3
+    actions:
+      backport:
+        title: "[4.3.x] {{ title }} (backport #{{ number }})"
+        branches:
+          - stable/4.3.x