diff --git a/src/Resources/config/doctrine/model/GiftCard.orm.xml b/src/Resources/config/doctrine/model/GiftCard.orm.xml
index 4f1672f6..ea4b7f01 100644
--- a/src/Resources/config/doctrine/model/GiftCard.orm.xml
+++ b/src/Resources/config/doctrine/model/GiftCard.orm.xml
@@ -33,7 +33,7 @@
         <!-- Refers to the order item unit where this gift card was bought -->
         <one-to-one field="orderItemUnit" target-entity="Sylius\Component\Order\Model\OrderItemUnitInterface"
                     inversed-by="giftCard">
-            <join-column name="order_item_unit_id" referenced-column-name="id" on-delete="SET NULL"/>
+            <join-column name="order_item_unit_id" referenced-column-name="id" on-delete="CASCADE"/>
         </one-to-one>
 
         <!-- A list of orders where this gift card was applied / used -->