1 files changed, 6 insertions, 1 deletions
diff --git a/app/services/merge_requests/update_service.rb b/app/services/merge_requests/update_service.rb
index 6319ad805b6..6fd569dc302 100644
--- a/app/services/merge_requests/update_service.rb
+++ b/app/services/merge_requests/update_service.rb
@@ -14,7 +14,7 @@ module MergeRequests
       update(merge_request)
     end
 
-    def handle_changes(merge_request, options = {})
+    def handle_changes(issue, old_labels: [], new_labels: [])
       if has_changes?(merge_request, options)
         todo_service.mark_pending_todos_as_done(merge_request, current_user)
       end
@@ -44,6 +44,11 @@ module MergeRequests
           merge_request.previous_changes.include?('source_branch')
         merge_request.mark_as_unchecked
       end
+
+      new_labels = merge_request.added_labels(old_labels)
+      if new_labels.present?
+        notification_service.relabeled_merge_request(merge_request, new_labels, current_user)
+      end
     end
 
     def reopen_service