diff --git a/src/FreightOrder/UseCases/CreateFreightOrder.php b/src/FreightOrder/UseCases/CreateFreightOrder.php
index f26ee91..ed87f7d 100644
--- a/src/FreightOrder/UseCases/CreateFreightOrder.php
+++ b/src/FreightOrder/UseCases/CreateFreightOrder.php
@@ -25,6 +25,9 @@ class CreateFreightOrder
         return $savedFreightOrder;
     }
 
+    /**
+     * @param int[] $carrierIds
+     */
     private function updateCarriers(
         array $carrierIds,
         int $freightOrderId