diff --git a/src/Validator/Consignment/UPSConsignmentValidator.php b/src/Validator/Consignment/UPSConsignmentValidator.php
index 2d00980d..03b8dc77 100644
--- a/src/Validator/Consignment/UPSConsignmentValidator.php
+++ b/src/Validator/Consignment/UPSConsignmentValidator.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace MyParcelNL\Sdk\src\Validator\Consignment;
 
 use MyParcelNL\Sdk\src\Rule\Consignment\DeliveryDateRule;