# Tailwind CSS v0.5.1 — Release & Upgrade Intelligence
- **Product:** Tailwind CSS (https://tailwindcss.com)
- **Version:** v0.5.1
- **Released:** Mar 13, 2018
- **Impact Score:** 7/10
- **Breaking Changes:** Source flagged
- **Canonical Analysis:** https://changelogs.us/tailwind/updates/v0.5.1/

## Executive Summary (TL;DR)
Tailwind CSS v0.5.1. Source highlight: Reverts a change that renamed the `.roman` class to `.not-italic` due to the fact that it breaks compatibility with cssnext: https://github.com/postcss/postcss-selector-not/issues/10

## Breaking Changes & Deprecations
- We'll stick with `.roman` for now with a plan to switch to `.not-italic` in another breaking version should that issue get resolved in `postcss-selector-not`.

## Upgrade Command
```bash
npm install --save-exact tailwindcss@0.5.1
```