diff --git a/app/controller/Repeat.php b/app/controller/Repeat.php
index d82569f..e121026 100644
--- a/app/controller/Repeat.php
+++ b/app/controller/Repeat.php
@@ -2,6 +2,7 @@
 namespace app\controller;
 
 use app\BaseController;
+use library\Tree;
 use think\facade\Db;
 use think\response\Json;