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[Home](./index.md) &gt; [bitburner](./bitburner.md) &gt; [Hacknet](./bitburner.hacknet.md) &gt; [upgradeCache](./bitburner.hacknet.upgradecache.md)

## Hacknet.upgradeCache() method

Upgrade the cache of a hacknet node.

**Signature:**

```typescript
upgradeCache(index: number, n?: number): boolean;
```

## Parameters

|  Parameter | Type | Description |
|  --- | --- | --- |
|  index | number | Index/Identifier of Hacknet Node. |
|  n | number | _(Optional)_ Number of cache levels to purchase. Must be positive. Rounded to nearest integer. Defaults to 1 if not specified. |

**Returns:**

boolean

True if the Hacknet Node’s cache level is successfully upgraded, false otherwise.

## Remarks

RAM cost: 0 GB

This function is only applicable for Hacknet Servers (the upgraded version of a Hacknet Node).

Tries to upgrade the specified Hacknet Server’s cache n times.

Returns true if it successfully upgrades the Server’s cache n times, or if it purchases some positive amount and the Server reaches its max cache level.

Returns false otherwise.