> For the complete documentation index, see [llms.txt](https://docs.isle.finance/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.isle.finance/contract-documentation/upgradability.md).

# Upgradability

## Overview

The governor is responsible for upgrading contracts when required.

## Contracts

* Immutable
  * `Pool.sol`
  * `PoolAddressesProvider.sol`
* UUPS upgradable
  * `Receivables.sol`
  * `IsleGlobals.sol`
* Transparent Upgradable
  * `PoolConfigurator.sol`
  * `WithdrawalManager.sol`
  * `LoanManager.sol`