<!-- Do not edit this file. It is automatically generated by API Documenter. --> [Home](./index.md) > [bitburner](./bitburner.md) > [Corporation](./bitburner.corporation.md) > [purchaseUnlock](./bitburner.corporation.purchaseunlock.md) ## Corporation.purchaseUnlock() method Unlock an upgrade **Signature:** ```typescript purchaseUnlock(upgradeName: string): void; ``` ## Parameters | Parameter | Type | Description | | --- | --- | --- | | upgradeName | string | Name of the upgrade | **Returns:** void