# Astro astro@5.16.1 — Release & Upgrade Intelligence
- **Product:** Astro (https://astro.build)
- **Version:** astro@5.16.1
- **Released:** Nov 26, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/astro/updates/astro-5.16.1/

## Executive Summary (TL;DR)
Astro astro@5.16.1. Source highlight: Fixes an unhandled rejection issue when using Astro with Vercel Workflow DevKit

## Bug Fixes
- Fixes an unhandled rejection issue when using Astro with Vercel Workflow DevKit
- Updates `button` attributes types to allow `command` and `commandfor`
- Fixes `Astro.glob` to be correctly marked as deprecated
- Fixes support for Astro component rendering in Vitest test suites using a “client” environment such as `happy-dom` or `jsdom`
- Improves syncing

## Upgrade Command
```bash
npm install --save-exact astro@5.16.1
```