diff --git a/src/Repository/NameserverRepository.php b/src/Repository/NameserverRepository.php
index 152375a..c145cfa 100644
--- a/src/Repository/NameserverRepository.php
+++ b/src/Repository/NameserverRepository.php
@@ -1,4 +1,4 @@
-<?php
+<?php declare(strict_types=1);
 
 namespace App\Repository;