diff --git a/runtime/rpc_server.cpp b/runtime/rpc_server.cpp
index 1194ed8..6fedf84 100644
--- a/runtime/rpc_server.cpp
+++ b/runtime/rpc_server.cpp
@@ -58,7 +58,7 @@ auto slige_rpc::RpcServer<Functor>::listen() -> Res<Unit>
                 }
                 auto req = sliger::json::parse_json(message);
                 auto writer = BufferedWriter(client);
-                this->functor(req, writer);
+                this->functor(req, std::move(writer));
                 message.clear();
                 break;
             }
diff --git a/runtime/rpc_server.hpp b/runtime/rpc_server.hpp
index 6e3b9c2..fcf84ae 100644
--- a/runtime/rpc_server.hpp
+++ b/runtime/rpc_server.hpp
@@ -63,6 +63,10 @@ public:
         : fd(fd)
     {
     }
+    BufferedWriter(const BufferedWriter&) = delete;
+    BufferedWriter operator=(const BufferedWriter&) = delete;
+    BufferedWriter(BufferedWriter&&) = delete;
+    BufferedWriter operator=(BufferedWriter&&) = delete;
     ~BufferedWriter() { close(fd); }
 
     auto flush() -> Res<size_t>;