diff --git a/src/products/views/ProductVariant.tsx b/src/products/views/ProductVariant.tsx
index c5c2680c5..1e9b16648 100644
--- a/src/products/views/ProductVariant.tsx
+++ b/src/products/views/ProductVariant.tsx
@@ -278,7 +278,7 @@ export const ProductVariant: React.FC<ProductUpdateProps> = ({
         id: variantId,
         removeStocks: data.removeStocks,
         sku: data.sku,
-        quantityLimitPerCustomer: data.quantityLimitPerCustomer || null,
+        quantityLimitPerCustomer: Number(data.quantityLimitPerCustomer) || null,
         stocks: data.updateStocks.map(mapFormsetStockToStockInput),
         trackInventory: data.trackInventory,
         preorder: data.isPreorder
diff --git a/src/products/views/ProductVariantCreate.tsx b/src/products/views/ProductVariantCreate.tsx
index 5bee3c4c9..5e010bcd0 100644
--- a/src/products/views/ProductVariantCreate.tsx
+++ b/src/products/views/ProductVariantCreate.tsx
@@ -119,6 +119,8 @@ export const ProductVariant: React.FC<ProductVariantCreateProps> = ({
           })),
           trackInventory: true,
           weight: weight(formData.weight),
+          quantityLimitPerCustomer:
+            Number(formData.quantityLimitPerCustomer) || null,
           preorder: formData.isPreorder
             ? {
                 globalThreshold: formData.globalThreshold