[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: CorpUnlockName): void; ``` ## Parameters

Parameter	Type	Description
upgradeName	[CorpUnlockName](./bitburner.corpunlockname.md)	Name of the upgrade

**Returns:** void ## Remarks RAM cost: 20 GB