diff --git a/plugin/webman/gateway/Events.php b/plugin/webman/gateway/Events.php
index b63f284..39160d3 100644
--- a/plugin/webman/gateway/Events.php
+++ b/plugin/webman/gateway/Events.php
@@ -132,8 +132,8 @@ class Events
                     $res = Redis::set($redis_str, json_encode($message['data']));
                     // 将桌号存入redis 以便及时删除
                     $time_discount_info = Redis::get('time_discount:info');
-                    $arr_time_discount_info = json_decode($time_discount_info, true);
                     if($time_discount_info) {
+                        $arr_time_discount_info = explode(',', $time_discount_info);
                         if(!in_array($redis_str, $arr_time_discount_info)) {
                             $time_discount_info = array_merge($arr_time_discount_info, $redis_str);
                             Redis::set('time_discount:info', implode(',', $time_discount_info) . ',');