diff --git a/spec/Entity/RefundPaymentSpec.php b/spec/Entity/RefundPaymentSpec.php
index 514df165..32c8cff2 100644
--- a/spec/Entity/RefundPaymentSpec.php
+++ b/spec/Entity/RefundPaymentSpec.php
@@ -14,15 +14,16 @@
 namespace spec\Sylius\RefundPlugin\Entity;
 
 use PhpSpec\ObjectBehavior;
+use Sylius\Component\Core\Model\OrderInterface;
 use Sylius\Component\Core\Model\PaymentMethodInterface;
 use Sylius\RefundPlugin\Entity\RefundPayment;
 use Sylius\RefundPlugin\Entity\RefundPaymentInterface;
 
 final class RefundPaymentSpec extends ObjectBehavior
 {
-    public function let(PaymentMethodInterface $paymentMethod): void
+    public function let(OrderInterface $order, PaymentMethodInterface $paymentMethod): void
     {
-        $this->beConstructedWith('000002', 100, 'USD', RefundPaymentInterface::STATE_NEW, $paymentMethod);
+        $this->beConstructedWith($order, 100, 'USD', RefundPaymentInterface::STATE_NEW, $paymentMethod);
     }
 
     public function it_is_initializable(): void
@@ -40,8 +41,11 @@ public function it_has_no_id_by_default(): void
         $this->getId()->shouldReturn(null);
     }
 
-    public function it_has_order_number(): void
+    public function it_has_an_order(OrderInterface $order): void
     {
+        $order->getNumber()->willReturn('000002');
+
+        $this->getOrder()->shouldReturn($order);
         $this->getOrderNumber()->shouldReturn('000002');
     }
 
diff --git a/spec/Factory/RefundPaymentFactorySpec.php b/spec/Factory/RefundPaymentFactorySpec.php
index 735862f1..9b518691 100644
--- a/spec/Factory/RefundPaymentFactorySpec.php
+++ b/spec/Factory/RefundPaymentFactorySpec.php
@@ -14,6 +14,7 @@
 namespace spec\Sylius\RefundPlugin\Factory;
 
 use PhpSpec\ObjectBehavior;
+use Sylius\Component\Core\Model\OrderInterface;
 use Sylius\Component\Core\Model\PaymentMethodInterface;
 use Sylius\Component\Core\Repository\PaymentMethodRepositoryInterface;
 use Sylius\RefundPlugin\Entity\RefundPayment;
@@ -40,19 +41,21 @@ public function it_implements_refund_payment_factory_interface(): void
 
     public function it_creates_new_refund_payment(
         PaymentMethodRepositoryInterface $paymentMethodRepository,
-        PaymentMethodInterface $paymentMethod
+        PaymentMethodInterface $paymentMethod,
+        OrderInterface $order
     ): void {
         $paymentMethodRepository->find(1)->willReturn($paymentMethod);
 
-        $this->createWithData(
-            '0002',
-            1000,
-            'USD',
-            RefundPaymentInterface::STATE_NEW,
-            1
-        )->shouldBeLike(
-            new RefundPayment(
-                '0002',
+        $this
+            ->createWithData(
+                $order,
+                1000,
+                'USD',
+                RefundPaymentInterface::STATE_NEW,
+                1
+            )
+            ->shouldBeLike(new RefundPayment(
+                    $order->getWrappedObject(),
                 1000,
                 'USD',
                 RefundPaymentInterface::STATE_NEW,
diff --git a/spec/ProcessManager/RefundPaymentProcessManagerSpec.php b/spec/ProcessManager/RefundPaymentProcessManagerSpec.php
index 3c5c12d7..cfd0ab0b 100644
--- a/spec/ProcessManager/RefundPaymentProcessManagerSpec.php
+++ b/spec/ProcessManager/RefundPaymentProcessManagerSpec.php
@@ -15,6 +15,8 @@
 
 use Doctrine\ORM\EntityManagerInterface;
 use PhpSpec\ObjectBehavior;
+use Sylius\Component\Core\Model\OrderInterface;
+use Sylius\Component\Core\Repository\OrderRepositoryInterface;
 use Sylius\RefundPlugin\Entity\RefundPaymentInterface;
 use Sylius\RefundPlugin\Event\RefundPaymentGenerated;
 use Sylius\RefundPlugin\Event\UnitsRefunded;
@@ -33,6 +35,7 @@ public function let(
         OrderFullyRefundedStateResolverInterface $orderFullyRefundedStateResolver,
         RelatedPaymentIdProviderInterface $relatedPaymentIdProvider,
         RefundPaymentFactoryInterface $refundPaymentFactory,
+        OrderRepositoryInterface $orderRepository,
         EntityManagerInterface $entityManager,
         MessageBusInterface $eventBus
     ): void {
@@ -40,6 +43,7 @@ public function let(
             $orderFullyRefundedStateResolver,
             $relatedPaymentIdProvider,
             $refundPaymentFactory,
+            $orderRepository,
             $entityManager,
             $eventBus
         );
@@ -54,12 +58,16 @@ public function it_reacts_on_units_refunded_event_and_creates_refund_payment(
         OrderFullyRefundedStateResolverInterface $orderFullyRefundedStateResolver,
         RelatedPaymentIdProviderInterface $relatedPaymentIdProvider,
         RefundPaymentFactoryInterface $refundPaymentFactory,
+        OrderRepositoryInterface $orderRepository,
         EntityManagerInterface $entityManager,
+        MessageBusInterface $eventBus,
         RefundPaymentInterface $refundPayment,
-        MessageBusInterface $eventBus
+        OrderInterface $order
     ): void {
+        $orderRepository->findOneByNumber('000222')->willReturn($order);
+
         $refundPaymentFactory->createWithData(
-            '000222',
+            $order,
             1000,
             'USD',
             RefundPaymentInterface::STATE_NEW,
@@ -72,7 +80,7 @@ public function it_reacts_on_units_refunded_event_and_creates_refund_payment(
         $orderFullyRefundedStateResolver->resolve('000222')->shouldBeCalled();
 
         $refundPayment->getId()->willReturn(10);
-        $refundPayment->getOrderNumber()->willReturn('000222');
+        $refundPayment->getOrder()->willReturn($order);
         $refundPayment->getAmount()->willReturn(1000);
 
         $relatedPaymentIdProvider->getForRefundPayment($refundPayment)->willReturn(3);
diff --git a/src/Entity/RefundPayment.php b/src/Entity/RefundPayment.php
index 385041ee..f5afba62 100644
--- a/src/Entity/RefundPayment.php
+++ b/src/Entity/RefundPayment.php
@@ -13,6 +13,7 @@
 
 namespace Sylius\RefundPlugin\Entity;
 
+use Sylius\Component\Core\Model\OrderInterface;
 use Sylius\Component\Core\Model\PaymentMethodInterface;
 
 class RefundPayment implements RefundPaymentInterface
@@ -20,8 +21,8 @@ class RefundPayment implements RefundPaymentInterface
     /** @var int|null */
     protected $id;
 
-    /** @var string */
-    protected $orderNumber;
+    /** @var OrderInterface */
+    protected $order;
 
     /** @var int */
     protected $amount;
@@ -36,13 +37,13 @@ class RefundPayment implements RefundPaymentInterface
     protected $paymentMethod;
 
     public function __construct(
-        string $orderNumber,
+        OrderInterface $order,
         int $amount,
         string $currencyCode,
         string $state,
         PaymentMethodInterface $paymentMethod
     ) {
-        $this->orderNumber = $orderNumber;
+        $this->order = $order;
         $this->amount = $amount;
         $this->currencyCode = $currencyCode;
         $this->state = $state;
@@ -54,9 +55,14 @@ public function getId(): ?int
         return $this->id;
     }
 
+    public function getOrder(): OrderInterface
+    {
+        return $this->order;
+    }
+
     public function getOrderNumber(): string
     {
-        return $this->orderNumber;
+        return $this->getOrder()->getNumber();
     }
 
     public function getAmount(): int
diff --git a/src/Entity/RefundPaymentInterface.php b/src/Entity/RefundPaymentInterface.php
index 1f14ddcf..d2dd4c62 100644
--- a/src/Entity/RefundPaymentInterface.php
+++ b/src/Entity/RefundPaymentInterface.php
@@ -13,6 +13,7 @@
 
 namespace Sylius\RefundPlugin\Entity;
 
+use Sylius\Component\Core\Model\OrderInterface;
 use Sylius\Component\Core\Model\PaymentMethodInterface;
 use Sylius\Component\Resource\Model\ResourceInterface;
 
@@ -22,6 +23,9 @@ interface RefundPaymentInterface extends ResourceInterface
 
     public const STATE_COMPLETED = 'completed';
 
+    public function getOrder(): OrderInterface;
+
+    /** @deprecated this function is deprecated and will be removed in v1.0. Use RefundPaymentInterface::getOrder() instead */
     public function getOrderNumber(): string;
 
     public function getAmount(): int;
diff --git a/src/Factory/RefundPaymentFactory.php b/src/Factory/RefundPaymentFactory.php
index c1cc8fd4..c9b05af4 100644
--- a/src/Factory/RefundPaymentFactory.php
+++ b/src/Factory/RefundPaymentFactory.php
@@ -13,6 +13,7 @@
 
 namespace Sylius\RefundPlugin\Factory;
 
+use Sylius\Component\Core\Model\OrderInterface;
 use Sylius\Component\Core\Model\PaymentMethodInterface;
 use Sylius\Component\Core\Repository\PaymentMethodRepositoryInterface;
 use Sylius\RefundPlugin\Entity\RefundPayment;
@@ -29,7 +30,7 @@ public function __construct(PaymentMethodRepositoryInterface $paymentMethodRepos
     }
 
     public function createWithData(
-        string $orderNumber,
+        OrderInterface $order,
         int $amount,
         string $currencyCode,
         string $state,
@@ -38,6 +39,6 @@ public function createWithData(
         /** @var PaymentMethodInterface $paymentMethod */
         $paymentMethod = $this->paymentMethodRepository->find($paymentMethodId);
 
-        return new RefundPayment($orderNumber, $amount, $currencyCode, $state, $paymentMethod);
+        return new RefundPayment($order, $amount, $currencyCode, $state, $paymentMethod);
     }
 }
diff --git a/src/Factory/RefundPaymentFactoryInterface.php b/src/Factory/RefundPaymentFactoryInterface.php
index 1f865415..d9fccc42 100644
--- a/src/Factory/RefundPaymentFactoryInterface.php
+++ b/src/Factory/RefundPaymentFactoryInterface.php
@@ -13,12 +13,13 @@
 
 namespace Sylius\RefundPlugin\Factory;
 
+use Sylius\Component\Core\Model\OrderInterface;
 use Sylius\RefundPlugin\Entity\RefundPaymentInterface;
 
 interface RefundPaymentFactoryInterface
 {
     public function createWithData(
-        string $orderNumber,
+        OrderInterface $order,
         int $amount,
         string $currencyCode,
         string $state,
diff --git a/src/ProcessManager/RefundPaymentProcessManager.php b/src/ProcessManager/RefundPaymentProcessManager.php
index 689999bc..9931253b 100644
--- a/src/ProcessManager/RefundPaymentProcessManager.php
+++ b/src/ProcessManager/RefundPaymentProcessManager.php
@@ -14,6 +14,8 @@
 namespace Sylius\RefundPlugin\ProcessManager;
 
 use Doctrine\ORM\EntityManagerInterface;
+use Sylius\Component\Core\Model\OrderInterface;
+use Sylius\Component\Core\Repository\OrderRepositoryInterface;
 use Sylius\RefundPlugin\Entity\RefundPaymentInterface;
 use Sylius\RefundPlugin\Event\RefundPaymentGenerated;
 use Sylius\RefundPlugin\Event\UnitsRefunded;
@@ -21,6 +23,7 @@
 use Sylius\RefundPlugin\Provider\RelatedPaymentIdProviderInterface;
 use Sylius\RefundPlugin\StateResolver\OrderFullyRefundedStateResolverInterface;
 use Symfony\Component\Messenger\MessageBusInterface;
+use Webmozart\Assert\Assert;
 
 final class RefundPaymentProcessManager implements UnitsRefundedProcessStepInterface
 {
@@ -33,6 +36,9 @@ final class RefundPaymentProcessManager implements UnitsRefundedProcessStepInter
     /** @var RefundPaymentFactoryInterface */
     private $refundPaymentFactory;
 
+    /** @var OrderRepositoryInterface */
+    private $orderRepository;
+
     /** @var EntityManagerInterface */
     private $entityManager;
 
@@ -43,20 +49,26 @@ public function __construct(
         OrderFullyRefundedStateResolverInterface $orderFullyRefundedStateResolver,
         RelatedPaymentIdProviderInterface $relatedPaymentIdProvider,
         RefundPaymentFactoryInterface $refundPaymentFactory,
+        OrderRepositoryInterface $orderRepository,
         EntityManagerInterface $entityManager,
         MessageBusInterface $eventBus
     ) {
         $this->orderFullyRefundedStateResolver = $orderFullyRefundedStateResolver;
         $this->relatedPaymentIdProvider = $relatedPaymentIdProvider;
         $this->refundPaymentFactory = $refundPaymentFactory;
+        $this->orderRepository = $orderRepository;
         $this->entityManager = $entityManager;
         $this->eventBus = $eventBus;
     }
 
     public function next(UnitsRefunded $unitsRefunded): void
     {
+        /** @var OrderInterface|null $order */
+        $order = $this->orderRepository->findOneByNumber($unitsRefunded->orderNumber());
+        Assert::notNull($order);
+
         $refundPayment = $this->refundPaymentFactory->createWithData(
-            $unitsRefunded->orderNumber(),
+            $order,
             $unitsRefunded->amount(),
             $unitsRefunded->currencyCode(),
             RefundPaymentInterface::STATE_NEW,
diff --git a/src/Resources/config/doctrine/RefundPayment.orm.xml b/src/Resources/config/doctrine/RefundPayment.orm.xml
index 124b92f3..6c11c244 100644
--- a/src/Resources/config/doctrine/RefundPayment.orm.xml
+++ b/src/Resources/config/doctrine/RefundPayment.orm.xml
@@ -11,7 +11,6 @@
             <generator strategy="AUTO" />
         </id>
 
-        <field name="orderNumber" column="order_number" type="string" />
         <field name="amount" column="amount" type="integer" />
         <field name="currencyCode" column="currency_code" type="string" />
         <field name="state" column="state" type="string" />
@@ -19,5 +18,9 @@
         <many-to-one field="paymentMethod" target-entity="Sylius\Component\Payment\Model\PaymentMethodInterface">
             <join-column name="payment_method_id" referenced-column-name="id" nullable="true" />
         </many-to-one>
+
+        <many-to-one field="order" target-entity="Sylius\Component\Order\Model\OrderInterface">
+            <join-column name="order_id" />
+        </many-to-one>
     </mapped-superclass>
 </doctrine-mapping>
diff --git a/src/Resources/config/services/event_bus.xml b/src/Resources/config/services/event_bus.xml
index ec1eb7d4..b957f77d 100644
--- a/src/Resources/config/services/event_bus.xml
+++ b/src/Resources/config/services/event_bus.xml
@@ -31,6 +31,7 @@
             <argument type="service" id="Sylius\RefundPlugin\StateResolver\OrderFullyRefundedStateResolverInterface" />
             <argument type="service" id="Sylius\RefundPlugin\Provider\RelatedPaymentIdProviderInterface" />
             <argument type="service" id="Sylius\RefundPlugin\Factory\RefundPaymentFactoryInterface" />
+            <argument type="service" id="sylius.repository.order" />
             <argument type="service" id="doctrine.orm.default_entity_manager" />
             <argument type="service" id="sylius.event_bus" />
             <tag name="sylius_refund.units_refunded.process_step" priority="50" />