# Tailwind CSS v4.1.2 — Release & Upgrade Intelligence
- **Product:** Tailwind CSS (https://tailwindcss.com)
- **Version:** v4.1.2
- **Released:** Apr 03, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/tailwind/updates/v4.1.2/

## Executive Summary (TL;DR)
Tailwind CSS v4.1.2. Source highlight: Don't rely on the presence of `@layer base` to polyfill `@property` (#17506)

## Bug Fixes
- Don't rely on the presence of `@layer base` to polyfill `@property` (#17506)
- Support setting multiple inset shadows as arbitrary values (#17523)
- Fix `drop-shadow-*` utilities that are defined with multiple shadows (#17515)
- PostCSS: Fix race condition when two changes are queued concurrently (#17514)
- PostCSS: Ensure files containing `@tailwind utilities` are processed (#17514)
- Ensure the `color-mix(…)` polyfill creates fallbacks even when using colors that cannot be statically analyzed (#17513)

## Upgrade Command
```bash
npm install --save-exact tailwindcss@4.1.2
```