diff --git a/system/database.php b/system/database.php
index 06cd259..21492b2 100644
--- a/system/database.php
+++ b/system/database.php
@@ -1,7 +1,8 @@
 <?php
 /**
  * @file database.php
- * @date 2018-04-13
+ * @created_on 2018-04-13
+ * @updated_on 2019-12-31
  * @author Go Namhyeon <gnh1201@gmail.com>
  * @brief Database module
  */