# Astro astro@6.4.5 — Release & Upgrade Intelligence
- **Product:** Astro (https://astro.build)
- **Version:** astro@6.4.5
- **Released:** Jun 09, 2026
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/astro/updates/astro-6.4.5/

## Executive Summary (TL;DR)
Astro astro@6.4.5. Source highlight: Fixes the `experimental.logger` destination not being used for the "Server listening on..." startup message. The logger is now resolved before the server starts listening, and `adapterLogger` re-creates itself when the underlying logger changes so the startup message uses the correct destination.

## Bug Fixes
- Fixes the `experimental.logger` destination not being used for the "Server listening on..." startup message. The logger is now resolved before the server starts listening, and `adapterLogger` re-creates itself when the underlying logger changes so the startup message uses the correct destination.
- Fixes `Astro.request.url` not reflecting validated `X-Forwarded-Proto`/`X-Forwarded-Host` headers when `security.allowedDomains` is configured. Previously, only `Astro.url` was updated with the forwarded origin while `Astro.request.url` retained the socket-derived URL, causing the two to diverge behind TLS-terminating proxies.
- Reverts a change to `isNode` runtime detection that caused a significant build time regression for Cloudflare adapter users with large prerendered sites

## Upgrade Command
```bash
npm install --save-exact astro@6.4.5
```