diff --git a/src/Libs/Model.php b/src/Libs/Model.php
index ef9c78e..e8de154 100644
--- a/src/Libs/Model.php
+++ b/src/Libs/Model.php
@@ -705,7 +705,7 @@ class Model {
      *
      * @return Model|null
      */
-    public static function getById($id): ?Model {
+    public static function getById(mixed $id): ?Model {
         return static::where(static::$primaryKey, $id)->getFirst();
     }