diff --git a/src/FileManager.php b/src/FileManager.php
index aa879cd..e62343e 100644
--- a/src/FileManager.php
+++ b/src/FileManager.php
@@ -72,7 +72,7 @@ public function initialize(): array
         }
 
         // get language
-        $config['lang'] = app()->getLocale();
+        $config['lang'] = str_replace('_','-',app()->getLocale());
 
         return [
             'result' => [