diff --git a/web_socket_server.ts b/web_socket_server.ts
index 0952608..e72e0d7 100644
--- a/web_socket_server.ts
+++ b/web_socket_server.ts
@@ -5,9 +5,13 @@ export function WebSocketServer(options : Deno.ServeOptions | Deno.ServeTlsOptio
         if (request.headers.get("upgrade") != "websocket") {
             return new Response(null, { status: 501 });
         }
+
+        // Needed because of a bug: https://github.com/denoland/deno/issues/19471
+        const req = Object.assign({}, request)
+
         const {socket, response} = Deno.upgradeWebSocket(request)
 
-        handler(socket, request)
+        handler(socket, req);
 
         return response
     })