+++ 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!]