Kamailio is one of the most widely used open source SIP servers for large VoIP and real-time communication platforms. The talk will give an overview of the key topics of the newly released version 6.0, describing the improvements in the UDP worker architecture, asynchronous processing, the new build system and other important changes. The presentation is aimed at people who are interested in developing high-performance VoIP platforms, developers who want to extend or improve Kamailio, and operations experts who run Kamailio infrastructures.