diff --git a/System/Crontab/Consumer.php b/System/Crontab/Consumer.php
index ce94f49e..d0388951 100644
--- a/System/Crontab/Consumer.php
+++ b/System/Crontab/Consumer.php
@@ -58,7 +58,7 @@ class Consumer extends Process
      */
     public function tick(\Swoole\Process $process)
     {
-        [$value, $startTime] = swoole_unserialize($process->read(-1));
+        [$value, $startTime] = swoole_unserialize($process->read());
 
         $redis = Snowflake::app()->getRedis();