diff --git a/src/Models/NTAKOrder.php b/src/Models/NTAKOrder.php
index 480b57d..51bbc49 100644
--- a/src/Models/NTAKOrder.php
+++ b/src/Models/NTAKOrder.php
@@ -49,7 +49,7 @@ public function __construct(
         if ($orderType !== NTAKOrderType::NORMAL) {
             $this->validateIfNotNormal();
         }
-        if ($orderType !== NTAKOrderType::STORNO) {
+        if ($orderType !== NTAKOrderType::SZTORNO) {
             $this->validateIfNotStorno();
         }
 
@@ -192,7 +192,7 @@ protected function validateIfNotStorno(): void
      */
     protected function calculateTotal(): int
     {
-        if ($this->orderType !== NTAKOrderType::STORNO) {
+        if ($this->orderType !== NTAKOrderType::SZTORNO) {
             $total = $this->totalOfOrderItems($this->orderItems);
 
             return $total + $total * $this->serviceFee / 100;
@@ -212,7 +212,7 @@ protected function calculateTotalWithDiscount(): int
             return $this->total;
         }
 
-        if ($this->orderType !== NTAKOrderType::STORNO) {
+        if ($this->orderType !== NTAKOrderType::SZTORNO) {
             $total = $this->totalOfOrderItemsWithDiscount($this->orderItems);
 
             return $total + $total * $this->serviceFee / 100;
diff --git a/src/NTAK.php b/src/NTAK.php
index 12f5242..11b2e0b 100644
--- a/src/NTAK.php
+++ b/src/NTAK.php
@@ -88,21 +88,21 @@ public function handleOrder(NTAKOrder ...$ntakOrders): string
                     ? null
                     : $ntakOrder->ntakOrderId,
                 'targynap'                     => $ntakOrder->end->format('Y-m-d'),
-                'rendelesKezdete'              => $ntakOrder->orderType === NTAKOrderType::STORNO
+                'rendelesKezdete'              => $ntakOrder->orderType === NTAKOrderType::SZTORNO
                     ? null
                     : $ntakOrder->start->timezone('Europe/Budapest')->toIso8601String(),
-                'rendelesVege'                 => $ntakOrder->orderType === NTAKOrderType::STORNO
+                'rendelesVege'                 => $ntakOrder->orderType === NTAKOrderType::SZTORNO
                     ? null
                     : $ntakOrder->end->timezone('Europe/Budapest')->toIso8601String(),
                 'helybenFogyasztott'           => $ntakOrder->isAtTheSpot,
                 'osszesitett'                  => false,
-                'fizetesiInformaciok'          => $ntakOrder->orderType === NTAKOrderType::STORNO
+                'fizetesiInformaciok'          => $ntakOrder->orderType === NTAKOrderType::SZTORNO
                     ? null
                     : [
                         'rendelesVegosszegeHUF' => $ntakOrder->totalWithDiscount(),
                         'fizetesiModok'         => $ntakOrder->buildPaymentTypes(),
                     ],
-                'rendelesTetelek'              => $ntakOrder->orderType === NTAKOrderType::STORNO
+                'rendelesTetelek'              => $ntakOrder->orderType === NTAKOrderType::SZTORNO
                     ? null
                     : $ntakOrder->buildOrderItems(),
             ];