[Home](./index.md) > [bitburner](./bitburner.md) > [WarehouseAPI](./bitburner.warehouseapi.md) > [upgradeWarehouse](./bitburner.warehouseapi.upgradewarehouse.md) ## WarehouseAPI.upgradeWarehouse() method Signature: ```typescript upgradeWarehouse(divisionName: string, cityName: string): void; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | divisionName | string | | | cityName | string | | Returns: void