diff --git a/demo/test.html b/demo/test.html
new file mode 100644
index 00000000..9a44c15a
--- /dev/null
+++ b/demo/test.html
@@ -0,0 +1,13 @@
+<html>
+<script src="https://cdn.ethers.io/lib/ethers-5.2.umd.min.js"
+        type="application/javascript">
+</script>
+
+<script type="application/javascript">
+    provider = new ethers.providers.WebSocketProvider("ws://127.0.0.1:9080/eth");
+    provider.getBlockNumber().then((blockNumber) => {
+        console.log("from dshackle", blockNumber);
+    }).catch(console.warn);
+</script>
+
+</html>
\ No newline at end of file
diff --git a/src/main/kotlin/io/emeraldpay/dshackle/proxy/WebsocketHandler.kt b/src/main/kotlin/io/emeraldpay/dshackle/proxy/WebsocketHandler.kt
index 3882d05b..b1fb0d7a 100644
--- a/src/main/kotlin/io/emeraldpay/dshackle/proxy/WebsocketHandler.kt
+++ b/src/main/kotlin/io/emeraldpay/dshackle/proxy/WebsocketHandler.kt
@@ -27,7 +27,6 @@ import io.emeraldpay.dshackle.rpc.NativeSubscribe
 import io.emeraldpay.etherjar.rpc.json.RequestJson
 import io.emeraldpay.etherjar.rpc.json.ResponseJson
 import io.netty.buffer.ByteBufInputStream
-import io.netty.buffer.Unpooled
 import org.reactivestreams.Publisher
 import org.slf4j.LoggerFactory
 import reactor.core.publisher.Flux
@@ -74,9 +73,8 @@ class WebsocketHandler(
             val eventHandler = accessHandler.start(req, routeConfig.blockchain)
 
             val responses = respond(routeConfig.blockchain, control, requests, eventHandler)
-                .map { Unpooled.wrappedBuffer(it.toByteArray()) }
 
-            resp.send(responses)
+            resp.sendString(responses, Charsets.UTF_8)
                 .then()
         }
     }
