# Changes to PostCSS IC Unit

### 5.0.1

_May 13, 2026_

- Updated [`@csstools/postcss-progressive-custom-properties`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties) to [`5.1.0`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties/CHANGELOG.md#510) (minor)

### 5.0.0

_January 14, 2026_

- Updated: Support for Node `20.19.0` or later (major).
- Removed: `commonjs` API. In supported Node versions `require(esm)` will work without needing to make code changes.
- Updated [`@csstools/utilities`](https://github.com/csstools/postcss-plugins/tree/main/packages/utilities) to [`3.0.0`](https://github.com/csstools/postcss-plugins/tree/main/packages/utilities/CHANGELOG.md#300) (major)
- Updated [`@csstools/postcss-progressive-custom-properties`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties) to [`5.0.0`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties/CHANGELOG.md#500) (major)

### 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)

### 4.0.3

_August 22, 2025_

- Updated [`@csstools/postcss-progressive-custom-properties`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties) to [`4.2.0`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties/CHANGELOG.md#420) (minor)

### 4.0.2

_May 27, 2025_

- Updated [`@csstools/postcss-progressive-custom-properties`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties) to [`4.1.0`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties/CHANGELOG.md#410) (minor)

### 4.0.1

_April 19, 2025_

- Updated [`@csstools/postcss-progressive-custom-properties`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties) to [`4.0.1`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties/CHANGELOG.md#401) (patch)

### 4.0.0

_August 3, 2024_

- Updated: Support for Node v18+ (major).
- Updated [`@csstools/utilities`](https://github.com/csstools/postcss-plugins/tree/main/packages/utilities) to [`2.0.0`](https://github.com/csstools/postcss-plugins/tree/main/packages/utilities/CHANGELOG.md#200) (major)
- Updated [`@csstools/postcss-progressive-custom-properties`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties) to [`4.0.0`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties/CHANGELOG.md#400) (major)

### 3.0.7

_July 7, 2024_

- Updated [`@csstools/postcss-progressive-custom-properties`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties) to [`3.3.0`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties/CHANGELOG.md#330) (minor)

### 3.0.6

_March 31, 2024_

- Updated [`@csstools/postcss-progressive-custom-properties`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties) to [`3.2.0`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties/CHANGELOG.md#320) (minor)

### 3.0.5

_March 13, 2024_

- Updated [`@csstools/postcss-progressive-custom-properties`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties) to [`3.1.1`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties/CHANGELOG.md#311) (patch)

### 3.0.4

_February 19, 2024_

- Reuse code with `@csstools/utilities`
- Updated [`@csstools/postcss-progressive-custom-properties`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties) to [`3.1.0`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties/CHANGELOG.md#310) (minor)

### 3.0.3

_December 15, 2023_

- Fix type definitions
- Updated [`@csstools/postcss-progressive-custom-properties`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties) to [`3.0.3`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties/CHANGELOG.md#303) (patch)

### 3.0.2

_October 9, 2023_

- Updated [`@csstools/postcss-progressive-custom-properties`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties) to [`3.0.2`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties/CHANGELOG.md#302) (patch)

### 3.0.1

_September 18, 2023_

- Improve performance
- Updated [`@csstools/postcss-progressive-custom-properties`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties) to [`3.0.1`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties/CHANGELOG.md#301) (patch)

### 3.0.0

_July 3, 2023_

- Change license to `MIT-0` ([read more about this change in the blog post](https://preset-env.cssdb.org/blog/license-change/))
- Updated [`@csstools/postcss-progressive-custom-properties`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties) to [`3.0.0`](https://github.com/csstools/postcss-plugins/tree/main/plugins/postcss-progressive-custom-properties/CHANGELOG.md#300) (major)

### 2.0.4

_June 1, 2023_

- Updated `@csstools/postcss-progressive-custom-properties` to `2.3.0` (minor)


### 2.0.3

_May 19, 2023_

- Updated `@csstools/postcss-progressive-custom-properties` to `2.2.0` (minor)


### 2.0.2

_February 8, 2023_

- Reduce the amount of duplicate fallback CSS.

### 2.0.1

_January 28, 2023_

- Improve `types` declaration in `package.json`

### 2.0.0

_January 24, 2023_

- Updated: Support for Node v14+ (major).

### 1.0.1

_July 8, 2022_

- Fix case insensitive matching.

### 1.0.0

_February 15, 2022_

- Initial version
