# TypeScript v4.5.5 — Release & Upgrade Intelligence
- **Product:** TypeScript (https://typescriptlang.org)
- **Version:** v4.5.5
- **Released:** Jan 20, 2022
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/typescript/updates/v4.5.5/

## Executive Summary (TL;DR)
TypeScript v4.5.5. Source highlight: This patch release includes a number of fixes to language service crashes and assertion violations, along with improvements to JSX attribute snippets.

## Bug Fixes
- fixed issues query for Typescript 4.5.0 (Beta).
- fixed issues query for Typescript 4.5.1 (RC).
- fixed issues query for Typescript 4.5.2 (Stable).
- fixed issues query for Typescript 4.5.3 (Stable).
- fixed issues query for Typescript 4.5.4 (Stable).
- fixed issues query for Typescript 4.5.5 (Stable).

## Upgrade Command
```bash
npm install --save-dev --save-exact typescript@4.5.5
```