I have taken the tip of standalone Asio, from: <https://github.com/chriskohlhoff/asio/commits/asio-1-10-branch> and applied this "boostify.pl" script: <https://github.com/chriskohlhoff/asio/blob/asio-1-10-branch/asio/boostify.pl> plus a bit of manual fixing, to produce a new branch of Boost.Asio which is up-to-date with respect to the stand-alone Asio. This means you can have access to the Networking-TS changes that will be introduced in Boost.Asio (according to the author, this will be in Boost 1.66.0). My preview of Boost.Asio version 1.66.0 is here: <https://github.com/vinniefalco/boost.asio/commits/net-ts> Beast has been ported to this version of Asio, you can try it here: <https://github.com/vinniefalco/beast/commits/net-ts> When Boost.Asio is updated for 1.66.0 to bring it in-line with the standalone Asio (which supports Networking-TS), Beast will simultaneously be updated. Hopefully this will all be done in time for 1.66.0, so that users of the debut version of Beast will have the latest interfaces available for their use. Thanks!