diff --git a/resources/views/welcome.blade.php b/resources/views/welcome.blade.php
index c6dd6921..af5d4e56 100644
--- a/resources/views/welcome.blade.php
+++ b/resources/views/welcome.blade.php
@@ -1,5 +1,5 @@
 <!doctype html>
-<html lang="{{ app()->getLocale() }}">
+<html lang="{{ str_replace('_', '-', app()->getLocale()) }}">
     <head>
         <meta charset="utf-8">
         <meta name="viewport" content="width=device-width, initial-scale=1">
