diff --git a/source/MaaHttp/source/main.cpp b/source/MaaHttp/source/main.cpp
index dd670de80..3c3421928 100644
--- a/source/MaaHttp/source/main.cpp
+++ b/source/MaaHttp/source/main.cpp
@@ -65,7 +65,7 @@ int main(int argc, char* argv[])
     }
     else {
         auto disp = new lhg::server::Dispatcher();
-        auto server = new lhg::server::Server(disp, port);
+        auto server = new lhg::server::Server(disp, static_cast<unsigned short>(port));
 
         auto self = boost::dll::program_location();