# Astro 5.9

DevFeed: [Astro 5.9](<https://devfeed.tech/articles/astro-5-9-3250.md>)

Original publisher: [Read original article](<https://astro.build/blog/astro-590/>)

Author: Emanuele Stoppa; Matt Kane

Published: 2025-06-05T00:00:00Z

Content type: release

Language: en

Sources: [The Astro Blog](<https://devfeed.tech/sources/the-astro-blog.md>)

Topics: [Astro](<https://devfeed.tech/topics/astro.md>), [Security](<https://devfeed.tech/topics/security.md>), [Markdown](<https://devfeed.tech/topics/markdown.md>), [Web Development](<https://devfeed.tech/topics/web-development.md>)

Tags: [astro](<https://devfeed.tech/tags/astro.md>), [cli](<https://devfeed.tech/tags/cli.md>), [csp](<https://devfeed.tech/tags/csp.md>), [markdown](<https://devfeed.tech/tags/markdown.md>), [security](<https://devfeed.tech/tags/security.md>), [xss](<https://devfeed.tech/tags/xss.md>)

## AI overview

Astro 5.9 introduces experimental Content Security Policy support, Markdown rendering in content loaders, optional removal of default styles for experimental responsive images, and adapter controls for suppressing feature-support logs.

## Source excerpt

Astro 5.9 has got your site on lockdown, with experimental support for Content Security Policy, rendering Markdown in content loaders, and more!