[Home](./index.md) > [bitburner](./bitburner.md) > [OfficeAPI](./bitburner.officeapi.md) > [upgradeOfficeSize](./bitburner.officeapi.upgradeofficesize.md) ## OfficeAPI.upgradeOfficeSize() method Upgrade office size. Signature: ```typescript upgradeOfficeSize(divisionName: string, cityName: string, size: number): void; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | divisionName | string | Name of the division | | cityName | string | Name of the city | | size | number | Amount of positions to open | Returns: void