[Home](./index.md) > [bitburner](./bitburner.md) > [Sleeve](./bitburner.sleeve.md) > [upgradeMemory](./bitburner.sleeve.upgradememory.md) ## Sleeve.upgradeMemory() method Upgrade memory of a sleeve. You must be in BitNode 10 to use this API. **Signature:** ```typescript upgradeMemory(sleeveNumber: number, amount: number): Result; ``` ## Parameters

Parameter	Type	Description
sleeveNumber	number	Index of the sleeve.
amount	number	Number of upgrades. Must be a positive integer.

**Returns:** [Result](./bitburner.result.md) Action result ## Remarks RAM cost: 4 GB