diff --git a/config/redis.php b/config/redis.php
index 0eb233d..2f9757a 100644
--- a/config/redis.php
+++ b/config/redis.php
@@ -18,6 +18,5 @@ return [
         'password' => null,
         'port' => 6379,
         'database' => 0,
-        'prefix'=> 'course_'
     ],
 ];