# Changes to PostCSS Custom Properties

### 15.0.4

_October 2, 2026_

- Share a single expansion budget across all declarations.
- Avoid a quadratic sibling scan when checking for an existing fallback declaration.
- Ignore custom properties in `@function` bodies.

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