diff --git a/README.md b/README.md
index 049f326..a1723ce 100644
--- a/README.md
+++ b/README.md
@@ -204,6 +204,7 @@ A curated list of Microservice Architecture related principles and technologies.
 - [Akka HTTP](http://doc.akka.io/docs/akka/current/scala/http) - Open source toolkit for building REST/HTTP-based integration layers on top of Scala and Akka (will replace Spray).
 - [Colossus](https://github.com/tumblr/colossus) - I/O and microservice library for Scala.
 - [Finatra](http://twitter.github.io/finatra/) - Fast, testable, Scala HTTP services built on Twitter-Server and Finagle.
+- [Http4s](http://http4s.org/) - A minimal, idiomatic Scala interface for HTTP
 - [Play](https://www.playframework.com/) - The high velocity web framework for Java and Scala.
 - [Scalatra](http://www.scalatra.org/) - Simple, accessible and free web micro-framework.
 - [Skinny Micro](https://github.com/skinny-framework/skinny-micro) - Micro-web framework to build servlet applications in Scala.