# Astro astro@5.16.4 — Release & Upgrade Intelligence
- **Product:** Astro (https://astro.build)
- **Version:** astro@5.16.4
- **Released:** Dec 03, 2025
- **Impact Score:** 5/10
- **Breaking Changes:** Not verified
- **Canonical Analysis:** https://changelogs.us/astro/updates/astro-5.16.4/

## Executive Summary (TL;DR)
Astro astro@5.16.4. Source highlight: Fixes a bug where Astro didn't properly combine CSP resources from the `csp` configuration with those added using the runtime API (`Astro.csp.insertDirective()`) to form grammatically correct CSP headers

## Bug Fixes
- Fixes a bug where Astro didn't properly combine CSP resources from the `csp` configuration with those added using the runtime API (`Astro.csp.insertDirective()`) to form grammatically correct CSP headers

## Upgrade Command
```bash
npm install --save-exact astro@5.16.4
```