diff --git a/base.php b/base.php
index cc16ebc7..41afa489 100644
--- a/base.php
+++ b/base.php
@@ -9,7 +9,7 @@
 // | Author: liu21st <liu21st@gmail.com>
 // +----------------------------------------------------------------------
 
-define('THINK_VERSION', '5.0.1');
+define('THINK_VERSION', '5.0.2dev');
 define('THINK_START_TIME', microtime(true));
 define('THINK_START_MEM', memory_get_usage());
 define('EXT', '.php');