diff --git a/prototypes/quic_demo/src/bin/quic_demo_relay_server.rs b/prototypes/quic_demo/src/bin/quic_demo_relay_server.rs
index 064c928..948eda9 100644
--- a/prototypes/quic_demo/src/bin/quic_demo_relay_server.rs
+++ b/prototypes/quic_demo/src/bin/quic_demo_relay_server.rs
@@ -199,8 +199,8 @@ struct RequestP2ToP4 {
 	client_id: String,
 }
 
-struct PtthNewConnection {
-	client_send: quinn::SendStream,
+struct PtthNewConnection <ClientSend: AsyncWrite + Unpin> {
+	client_send: ClientSend,
 	client_recv: quinn::RecvStream,
 	server_send: quinn::SendStream,
 	server_recv: quinn::RecvStream,
@@ -211,7 +211,7 @@ struct PtthConnection {
 	downlink_task: JoinHandle <anyhow::Result <()>>,
 }
 
-impl PtthNewConnection {
+impl <ClientSend: AsyncWrite + Unpin> PtthNewConnection <ClientSend> {
 	fn build (self) -> PtthConnection {
 		let Self {
 			mut client_send,
diff --git a/prototypes/quic_demo/src/prelude.rs b/prototypes/quic_demo/src/prelude.rs
index 03fc349..b94e1d6 100644
--- a/prototypes/quic_demo/src/prelude.rs
+++ b/prototypes/quic_demo/src/prelude.rs
@@ -18,7 +18,9 @@ pub use anyhow::{
 pub use futures_util::StreamExt;
 pub use tokio::{
 	io::{
+		AsyncRead,
 		AsyncReadExt,
+		AsyncWrite,
 		AsyncWriteExt,
 	},
 	net::TcpListener,