# Astro astro@5.9.1 — Release & Upgrade Intelligence
- **Product:** Astro (https://astro.build)
- **Version:** astro@5.9.1
- **Released:** Jun 07, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/astro/updates/astro-5.9.1/

## Executive Summary (TL;DR)
Astro astro@5.9.1. Source highlight: Fix bug where error pages would return invalid bodies if the upstream response was compressed

## Bug Fixes
- Fix bug where error pages would return invalid bodies if the upstream response was compressed
- Fixes a bug where vite virtual module ids were incorrectly added in the dev server
- Fixes wrong contents in CSP meta tag.
- Fixes a bug that caused view transition names to be lost.
- fix fallback not being removed when server island is rendered

## Upgrade Command
```bash
npm install --save-exact astro@5.9.1
```