+++
date = "2025-02-18T07:00:00+01:00"
title = "Cowboy 2.13"

+++

Cowboy `2.13.0` has been released!

Cowboy 2.13 focuses on improving the performance of
Websocket, as well as the HTTP protocols. It also
contains a variety of new features and bug fixes.

The performance improvements were detailed in the
https://ninenines.eu/articles/cowboy-2.13.0-performance/[Performance improvements in Cowboy 2.13]
article.

Cowboy 2.13 is the first release to feature
experimental support for the HTTP/3 protocol,
including Websocket over HTTP/3.

Cowboy 2.13 requires Erlang/OTP 24.0 or greater.
It is tested and supported on Linux, macOS and Windows.

A complete
list of changes can be found in the migration guide:
https://ninenines.eu/docs/en/cowboy/2.13/guide/migrating_from_2.12/[Migrating from Cowboy 2.12 to 2.13].

You can donate to this project via
https://github.com/sponsors/essen[GitHub Sponsors].

As usual, feedback is appreciated, and issues or
questions should be sent via Github tickets or
discussions. We also have a new Discord server.
https://discord.gg/x25nNq2fFE[Join Erlang OSS Discord now!]