diff --git a/common/Define/Model.php b/common/Define/Model.php
index 9d34102..b06ead8 100644
--- a/common/Define/Model.php
+++ b/common/Define/Model.php
@@ -12,7 +12,7 @@ abstract class Model extends BaseModel implements ModelInterface {
   const SELF_CONNECT_KEY = 'self_connect_key';
   const SIBLING_CONNECT_KEY = 'sibling_connect_key';
 
-  public function getTable() {
+  public function getTable(): string {
     return static::$_table;
   }