# Changes to PostCSS IC Unit

### 4.0.4

_September 21, 2025_

- Updated [`@csstools/postcss-progressive-custom-properties`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties) to [`4.2.1`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties/CHANGELOG.md#421) (patch)

[Full CHANGELOG](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-ic-unit/CHANGELOG.md)