diff --git a/README.md b/README.md
index 4fe43d7..e249605 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@ _Note: all edges of the vertex are removing._
 ### Add edge or update weight
 #### Request
 ```Json
-{"action": "SetEdge", "from": <Number>, "to": <Number>, "weight": <Number>}
+{"action": "AddEdge", "from": <Number>, "to": <Number>, "weight": <Number>}
 ```
 
 #### Response
diff --git a/main.cpp b/main.cpp
index cafa4a7..f7ac4e3 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,7 +1,8 @@
-#include <boost/beast.hpp>
 #include <boost/asio/ip/tcp.hpp>
 #include <boost/asio/spawn.hpp>
+#include <boost/beast.hpp>
 #include <boost/beast/core/buffers_to_string.hpp>
+#include <boost/program_options.hpp>
 
 #include <functional>
 #include <iostream>
@@ -13,6 +14,7 @@ namespace net = boost::asio;
 using tcp = net::ip::tcp;
 namespace beast = boost::beast;
 namespace ws = beast::websocket;
+namespace po = boost::program_options;
 
 void fail(beast::error_code ec, char const* what) {
   std::cerr << what << ": " << ec.message() << '\n';
@@ -32,9 +34,8 @@ void process(ws::stream<beast::tcp_stream>& wsock, net::yield_context yield) {
     std::cout << "request=" << request << '\n';
     auto response = p.serve(request);
     std::cout << "response=" << response << '\n';
-    net::const_buffer obuf(response.data(), response.size());
     wsock.text(wsock.got_text());
-    wsock.async_write(obuf, yield[ec]);
+    wsock.async_write(net::buffer(response), yield[ec]);
     if (ec) return fail(ec, "write");
   }
 }
@@ -56,9 +57,25 @@ void wait(net::io_context& ioc,
   }
 }
 
-int main() {
+int main(int argc, char* argv[]) {
+  unsigned short port{8080};
+
+  po::options_description args("Using");
+  args.add_options()
+    ("help", "produce help message")
+    ("port", po::value<unsigned short>(&port)->default_value(8080), "port to listen");
+
+  po::variables_map vm;
+  po::store(po::parse_command_line(argc, argv, args), vm);
+  po::notify(vm);
+
+  if (vm.count("help")) {
+      std::cout << args << "\n";
+      return 1;
+  }
+
   net::io_context ioc;
-  tcp::endpoint point{tcp::v6(), 8080};
+  tcp::endpoint point{tcp::v6(), port};
   net::spawn(ioc, [&ioc, point](auto yield) {
     wait(ioc, point, yield);
   });