> For the complete documentation index, see [llms.txt](https://docs.ocean.fi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ocean.fi/protocol-architecture/04-protocol-architecture/upgradability.md).

# Contract Upgradability

*Ocean uses UUPS proxies for upgradability. Each module contract (e.g., `MintingManager`, `OCUSD`) is behind a proxy managed by governance.*

```
contract OCUSD is UUPSUpgradeable, ERC20Upgradeable { ... }
```

*Upgrades are triggered via:*

```
function _authorizeUpgrade(address newImplementation) internal override onlyRole(GOVERNANCE_ROLE) {}
```