# How to Change Max Players on Your Core Keeper Server (/docs/core-keeper/player-slots)



import { Step, Steps } from 'fumadocs-ui/components/steps';

Via startup parameter:

```
-maxplayers 8
```

Or in `ServerConfig.json`:

```json
"maxNumberPlayers": 8
```

Notes [#notes]

* Default is **8 players** when `-maxplayers` is omitted
* Core Keeper was designed for up to 8 players in co-op
* Higher counts are technically possible but increase RAM and CPU usage
* The config file defaults to 100, but the CLI default of 8 is the practical standard

Related Guides [#related-guides]

* [Server Configuration](/docs/core-keeper/server-config)