-using boost::asio::experimental::co_spawn;
-using boost::asio::experimental::detached;
-namespace this_coro = boost::asio::experimental::this_coro;
+using boost::asio::awaitable;
+using boost::asio::co_spawn;
+using boost::asio::detached;
+using boost::asio::use_awaitable;
+namespace this_coro = boost::asio::this_coro;