---
title: "Docusaurus 3.9"
url: https://daily.dev/posts/docusaurus-3-9-deqtfifry
source_url: https://docusaurus.io/blog/releases/3.9
type: article
source: "Docusaurus"
published: 2025-09-25T17:49:57.930Z
updated: 2025-09-25T17:50:16.406Z
tags: ["webdev", "nodejs", "algolia", "docusaurus"]
reading_time: 5
upvotes: 127
comments: 8
language: en
---

> ## Documentation Index
> Fetch the complete documentation index at: https://daily.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Docusaurus 3.9

**[Docusaurus](https://daily.dev/sources/docusaurus)** · 5 min read · 127 upvotes · 8 comments

## Summary

Docusaurus 3.9 drops Node.js 18 support and requires Node.js 20+, adds Algolia DocSearch v4 with AI-powered search assistant, improves internationalization with new locale configuration options, introduces Mermaid ELK layout support for complex diagrams, and includes various performance improvements and bug fixes.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://docusaurus.io/blog/releases/3.9>

## Community discussion

Top comments from developers on daily.dev.

**@rappayne** · 5 upvotes

> @docasaurus Serious question ... you say you follow SEMVER but this release is a 3.9. Yet you're dropping support for Node 18. That's a breaking change! Shouldn't it be a 4.0 release according to SEMVER? Help me understand what I'm missing.

**@sergeyvolkov** · 1 upvotes

> I think this is almost not used technology to create documentation, maybe I am not right but most people use vitepress (me too)

**@shaktirajsinhjadeja** · 0 upvotes

> looks interesting :)

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---

Tags: [#webdev](https://daily.dev/tags/webdev), [#nodejs](https://daily.dev/tags/nodejs), [#algolia](https://daily.dev/tags/algolia), [#docusaurus](https://daily.dev/tags/docusaurus)

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