# Config

The configuration allows you to change the key values of the protocol, but limits the new values to preserve the safety of the users of the protocol. 

Configuration changes can be made by the Protocol Administrator.

The configuration is changed in the [Protocol Config](https://docs.foreprotocol.io/documentation/developers/smart-contracts/protocolconfig) smart contract. The contract is a [Market Config](https://docs.foreprotocol.io/documentation/protocol/config/market-config) contract factory that is assigned to each market. This prevents values for an already existing market from being changed.