diff --git a/server_http.hpp b/server_http.hpp
index fca271b..d457725 100644
--- a/server_http.hpp
+++ b/server_http.hpp
@@ -390,7 +390,7 @@ namespace SimpleWeb {
       if(config.address.size() > 0)
         endpoint = asio::ip::tcp::endpoint(asio::ip::address::from_string(config.address), config.port);
       else
-        endpoint = asio::ip::tcp::endpoint(asio::ip::tcp::v4(), config.port);
+        endpoint = asio::ip::tcp::endpoint(asio::ip::tcp::v6(), config.port);
 
       if(!io_service) {
         io_service = std::make_shared<asio::io_service>();