diff --git a/app/Console/Tasks/TeacherLiveNoticeTask.php b/app/Console/Tasks/TeacherLiveNoticeTask.php
index 6b3ddb0d..c5d34472 100644
--- a/app/Console/Tasks/TeacherLiveNoticeTask.php
+++ b/app/Console/Tasks/TeacherLiveNoticeTask.php
@@ -30,7 +30,7 @@ class TeacherLiveNoticeTask extends Task
         $keyName = $this->getCacheKeyName();
 
         foreach ($lives as $live) {
-            $redis->sAdd($keyName, $live->chapter_id);
+            $redis->sAdd($keyName, $live->id);
         }
 
         $redis->expire($keyName, 86400);