# What changed in @material-ui/core

> 1 change in @material-ui/core 4 from its official release notes, upgrade guides and advisories: 1 deprecations. Each one cited. Sources checked 2026-10-20. HTML: https://unstale.sh/npm/@material-ui/core/

To see which of these apply to a repository, run `npx @unstale/cli init` in it.

## @material-ui/core 4

### Deprecations

- @material-ui/core is deprecated on its registry: Material UI v4 doesn't receive active development since September 2021. See the guide https://mui.com/material-ui/migration/migration-v4/ to upgrade to v5. (4.12.4) — [source](https://www.npmjs.com/package/@material-ui/core)