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[Home](./index.md) &gt; [bitburner](./bitburner.md) &gt; [WarehouseAPI](./bitburner.warehouseapi.md) &gt; [upgradeWarehouse](./bitburner.warehouseapi.upgradewarehouse.md)

## WarehouseAPI.upgradeWarehouse() method

Upgrade warehouse

**Signature:**

```typescript
upgradeWarehouse(divisionName: string, city: CityName | `${CityName}`, amt?: number): void;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  divisionName | string | Name of the division |
|  city | [CityName](./bitburner.cityname.md) \| \`${[CityName](./bitburner.cityname.md)<!-- -->}\` | Name of the city |
|  amt | number | _(Optional)_ amount of upgrades defaults to 1 |

**Returns:**

void