diff --git a/lib/action_cable.dart b/lib/action_cable.dart
index 5556103..4f93b95 100644
--- a/lib/action_cable.dart
+++ b/lib/action_cable.dart
@@ -116,7 +116,7 @@ class ActionCable {
       case 'ping':
         // rails sends epoch as seconds not miliseconds
         _lastPing =
-            DateTime.fromMillisecondsSinceEpoch(payload['message'] * 1000);
+            DateTime.now();
         break;
       case 'welcome':
         if (onConnected != null) {
@@ -124,10 +124,18 @@ class ActionCable {
         }
         break;
       case 'disconnect':
-        final channelId = parseChannelId(payload['identifier']);
-        final onDisconnected = _onChannelDisconnectedCallbacks[channelId];
-        if (onDisconnected != null) {
-          onDisconnected();
+        final identifier = payload['identifier'];
+        if (identifier != null) {
+          final channelId = parseChannelId(payload['identifier']);
+          final onDisconnected = _onChannelDisconnectedCallbacks[channelId];
+          if (onDisconnected != null) {
+            onDisconnected();
+          }
+        } else {
+          final reason = payload['reason'];
+          if (reason != null && reason == 'unauthorized') {
+            if (this.onCannotConnect != null) this.onCannotConnect!();
+          }
         }
         break;
       case 'confirm_subscription':
diff --git a/pubspec.yaml b/pubspec.yaml
index 517e7f8..bc270de 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: action_cable
-version: 1.2.0
+version: 1.2.1
 description: >-
   ActionCable client port in dart, available in web, dartVM and flutter.
 homepage: https://github.com/namiwang/actioncable_dart