diff --git a/lib/core/rsocket_requester.dart b/lib/core/rsocket_requester.dart
index 02d65b8..28f25a7 100644
--- a/lib/core/rsocket_requester.dart
+++ b/lib/core/rsocket_requester.dart
@@ -153,7 +153,7 @@ class RSocketRequester extends RSocket {
     connection.write(setupPayloadFrame());
     if (mode == 'requester') {
       keepAliveTimer = Timer.periodic(
-          Duration(seconds: connectionSetupPayload!.keepAliveInterval),
+          Duration(milliseconds: connectionSetupPayload!.keepAliveIntervalMs),
           (Timer t) {
         if (!closed) {
           connection.write(FrameCodec.encodeKeepAlive(false, 0));
@@ -261,8 +261,7 @@ class RSocketRequester extends RSocket {
       case frame_types.REQUEST_RESPONSE:
         var requestResponseFrame = frame as RequestResponseFrame;
         if (responder != null && requestResponseFrame.payload != null) {
-          responder!.subscribe!(requestResponseFrame.payload)
-              .then((payload) {
+          responder!.subscribe!(requestResponseFrame.payload).then((payload) {
             connection.write(
                 FrameCodec.encodePayloadFrame(header.streamId, false, payload));
           }).catchError((error) {
@@ -315,8 +314,8 @@ class RSocketRequester extends RSocket {
 
   Uint8List setupPayloadFrame() {
     return FrameCodec.encodeSetupFrame(
-        connectionSetupPayload!.keepAliveInterval,
-        connectionSetupPayload!.keepAliveMaxLifetime,
+        connectionSetupPayload!.keepAliveIntervalMs,
+        connectionSetupPayload!.keepAliveMaxLifetimeMs,
         connectionSetupPayload!.metadataMimeType,
         connectionSetupPayload!.dataMimeType,
         connectionSetupPayload);
diff --git a/lib/core/rsocket_responder.dart b/lib/core/rsocket_responder.dart
index 1bed9f8..09ad82e 100644
--- a/lib/core/rsocket_responder.dart
+++ b/lib/core/rsocket_responder.dart
@@ -1,6 +1,5 @@
-
-
 import 'package:universal_io/io.dart';
+import 'package:web_socket_channel/src/channel.dart';
 
 import '../core/rsocket_requester.dart';
 import '../duplex_connection.dart';
@@ -21,8 +20,8 @@ class BaseResponder {
         if (header.type == frame_types.SETUP) {
           var setupFrame = frame as SetupFrame;
           var connectionSetupPayload = ConnectionSetupPayload()
-            ..keepAliveInterval = setupFrame.keepAliveInterval
-            ..keepAliveMaxLifetime = setupFrame.keepAliveMaxLifetime
+            ..keepAliveIntervalMs = setupFrame.keepAliveIntervalMs
+            ..keepAliveMaxLifetimeMs = setupFrame.keepAliveMaxLifetimeMs
             ..metadataMimeType = setupFrame.metadataMimeType
             ..dataMimeType = setupFrame.dataMimeType
             ..data = setupFrame.payload?.data
@@ -82,8 +81,8 @@ class WebSocketRSocketResponder extends BaseResponder implements Closeable {
     httpServer.listen((HttpRequest req) {
       if (req.uri.path == uri.path) {
         WebSocketTransformer.upgrade(req)
-            .then((webSocket) =>
-                receiveConnection(WebSocketDuplexConnection(webSocket)))
+            .then((webSocket) => receiveConnection(
+                WebSocketDuplexConnection(webSocket as WebSocketChannel)))
             .then((value) => {});
       }
     });
diff --git a/lib/frame/frame.dart b/lib/frame/frame.dart
index 7080970..6a9e0e0 100644
--- a/lib/frame/frame.dart
+++ b/lib/frame/frame.dart
@@ -118,8 +118,8 @@ class SetupFrame extends RSocketFrame {
   Payload? payload;
   String metadataMimeType = 'message/x.rsocket.composite-metadata.v0';
   String dataMimeType = 'application/json';
-  int keepAliveInterval = 20;
-  int keepAliveMaxLifetime = 90;
+  int keepAliveIntervalMs = 20 * 1000; // 20 seconds
+  int keepAliveMaxLifetimeMs = 90 * 1000; // 90 seconds
   String? resumeToken;
   bool leaseEnable = false;
 
@@ -135,11 +135,11 @@ class SetupFrame extends RSocketFrame {
     var minorVersion = buffer.readI16();
     var keepAliveInterval = buffer.readI32();
     if (keepAliveInterval != null) {
-      this.keepAliveInterval = keepAliveInterval;
+      this.keepAliveIntervalMs = keepAliveInterval;
     }
     var keepAliveMaxLifetime = buffer.readI32();
     if (keepAliveMaxLifetime != null) {
-      this.keepAliveMaxLifetime = keepAliveMaxLifetime;
+      this.keepAliveMaxLifetimeMs = keepAliveMaxLifetime;
     }
     //resume token extraction
     if (resumeEnable) {
@@ -337,8 +337,8 @@ class PayloadFrame extends RSocketFrame {
 
 class FrameCodec {
   static Uint8List encodeSetupFrame(
-      int keepAliveInterval,
-      int keepAliveMaxLifetime,
+      int keepAliveIntervalMs,
+      int keepAliveMaxLifetimeMs,
       String metadataMimeType,
       String dataMimeType,
       Payload? setupPayload) {
@@ -350,8 +350,8 @@ class FrameCodec {
         frameBuffer, frame_types.SETUP, setupPayload?.metadata, 0);
     frameBuffer.writeI16(MAJOR_VERSION);
     frameBuffer.writeI16(MINOR_VERSION);
-    frameBuffer.writeI32(keepAliveInterval);
-    frameBuffer.writeI32(keepAliveMaxLifetime);
+    frameBuffer.writeI32(keepAliveIntervalMs);
+    frameBuffer.writeI32(keepAliveMaxLifetimeMs);
     //Metadata Encoding MIME Type
     frameBuffer.writeI8(metadataMimeType.length);
     frameBuffer.writeBytes(utf8.encode(metadataMimeType));
diff --git a/lib/payload.dart b/lib/payload.dart
index b237919..d608ed8 100644
--- a/lib/payload.dart
+++ b/lib/payload.dart
@@ -44,16 +44,16 @@ class Payload {
 class ConnectionSetupPayload extends Payload {
   String metadataMimeType = 'message/x.rsocket.composite-metadata.v0';
   String dataMimeType = 'application/json';
-  int keepAliveInterval = 20;
-  int keepAliveMaxLifetime = 90;
+  int keepAliveIntervalMs = 20 * 1000; // 20 seconds
+  int keepAliveMaxLifetimeMs = 90 * 1000; // 90 seconds
   int flags = 0;
 
   @override
   Map toJson() => {
         'metadataMimeType': metadataMimeType,
         'dataMimeType': dataMimeType,
-        'keepAliveInterval': keepAliveInterval,
-        'keepAliveMaxLifetime': keepAliveMaxLifetime,
+        'keepAliveInterval': keepAliveIntervalMs,
+        'keepAliveMaxLifetime': keepAliveMaxLifetimeMs,
         'flags': flags,
         'metadata': metadata,
         'data': data
diff --git a/lib/rsocket_connector.dart b/lib/rsocket_connector.dart
index 8a70952..41697f1 100644
--- a/lib/rsocket_connector.dart
+++ b/lib/rsocket_connector.dart
@@ -8,8 +8,8 @@ import 'rsocket.dart';
 
 class RSocketConnector {
   Payload? payload;
-  int keepAliveInterval = 20;
-  int keepAliveMaxLifeTime = 90;
+  int keepAliveIntervalMs = 20 * 1000; // 20 seconds
+  int keepAliveMaxLifeTimeMs = 90 * 1000; // 90 seconds
   String _dataMimeType = 'application/json';
   String _metadataMimeType = 'message/x.rsocket.composite-metadata.v0';
   ErrorConsumer? _errorConsumer;
@@ -39,16 +39,16 @@ class RSocketConnector {
 
   // set the keep alive, and unit is second
   RSocketConnector keepAlive(int interval, int maxLifeTime) {
-    this.keepAliveInterval = interval;
-    this.keepAliveMaxLifeTime = maxLifeTime;
+    this.keepAliveIntervalMs = interval * 1000;
+    this.keepAliveMaxLifeTimeMs = maxLifeTime * 1000;
     return this;
   }
 
   Future<RSocket> connect(String url) async {
     TcpChunkHandler handler = (Uint8List chunk) {};
     var connectionSetupPayload = ConnectionSetupPayload()
-      ..keepAliveInterval = keepAliveInterval
-      ..keepAliveMaxLifetime = keepAliveMaxLifeTime
+      ..keepAliveIntervalMs = keepAliveIntervalMs
+      ..keepAliveMaxLifetimeMs = keepAliveMaxLifeTimeMs
       ..metadataMimeType = _metadataMimeType
       ..dataMimeType = _dataMimeType
       ..data = payload?.data