diff --git a/wasm-node/javascript/demo/demo-deno.ts b/wasm-node/javascript/demo/demo-deno.ts
index 8e3d68876f..c0b80d7508 100644
--- a/wasm-node/javascript/demo/demo-deno.ts
+++ b/wasm-node/javascript/demo/demo-deno.ts
@@ -69,8 +69,7 @@ while(true) {
 
     (async () => {
         try {
-            while(true) {
-                const response = await chain.nextJsonRpcResponse();
+            for await (const response of chain.jsonRpcResponses) {
                 socket.send(response);
             }
         } catch(_error) {}
diff --git a/wasm-node/javascript/demo/demo.mjs b/wasm-node/javascript/demo/demo.mjs
index f534d06ea1..e82598ba12 100644
--- a/wasm-node/javascript/demo/demo.mjs
+++ b/wasm-node/javascript/demo/demo.mjs
@@ -162,8 +162,7 @@ wsServer.on('connection', function (connection, request) {
 
             (async () => {
                 try {
-                    while(true) {
-                        const response = await para.nextJsonRpcResponse();
+                    for await (const response of para.jsonRpcResponses) {
                         connection.send(response);
                     }
                 } catch(_error) {}
@@ -177,8 +176,7 @@ wsServer.on('connection', function (connection, request) {
 
             (async () => {
                 try {
-                    while(true) {
-                        const response = await relay.nextJsonRpcResponse();
+                    for await (const response of relay.jsonRpcResponses) {
                         connection.send(response);
                     }
                 } catch(_error) {}