diff --git a/base.php b/base.php
index 00c8a499..e5c42fb9 100644
--- a/base.php
+++ b/base.php
@@ -9,7 +9,7 @@
 // | Author: liu21st <liu21st@gmail.com>
 // +----------------------------------------------------------------------
 
-ini_set("precision", 24);
+ini_set("precision", 18);
 define('THINK_VERSION', '5.0.0 RC4');
 define('THINK_START_TIME', microtime(true));
 define('THINK_START_MEM', memory_get_usage());