> Documentation index: [Saleor](/llms.txt) · [This section](/api-reference/products/llms.txt)
> Source: https://docs.saleor.io/api-reference/products/mutations/product-variant-update

# productVariantUpdate Mutation

Updates an existing variant for product.

Requires the MANAGE\_PRODUCTS permission.

```graphql
productVariantUpdate(
  externalReference: String
  id: ID
  input: ProductVariantInput!
  sku: String
): ProductVariantUpdate
```

Details

```graphql
type ProductVariantUpdate {
  productErrors: [ProductError!]! @deprecated
  errors: [ProductError!]!
  productVariant: ProductVariant
}
```

<a id="arguments"></a>

### Arguments

<a id="external-reference"></a>

#### [`externalReference`](#external-reference) ● [`String`](/api-reference/miscellaneous/scalars/string.md)

External ID of a product variant to update.

<a id="id"></a>

#### [`id`](#id) ● [`ID`](/api-reference/miscellaneous/scalars/id.md)

ID of a product to update.

<a id="input"></a>

#### [`input`](#input) ● [`ProductVariantInput!`](/api-reference/products/inputs/product-variant-input.md)

Fields required to update a product variant.

<a id="sku"></a>

#### [`sku`](#sku) ● [`String`](/api-reference/miscellaneous/scalars/string.md)

SKU of a product variant to update.

<a id="type"></a>

### Type

<a id="productvariantupdate"></a>

#### [`ProductVariantUpdate`](/api-reference/products/objects/product-variant-update.md)

Updates an existing variant for product.

Requires the MANAGE\_PRODUCTS permission.