diff --git a/android/src/main/kotlin/com/whelksoft/flutter_native_timezone/FlutterNativeTimezonePlugin.kt b/android/src/main/kotlin/com/whelksoft/flutter_native_timezone/FlutterNativeTimezonePlugin.kt
index 7a8ed34..803fe75 100644
--- a/android/src/main/kotlin/com/whelksoft/flutter_native_timezone/FlutterNativeTimezonePlugin.kt
+++ b/android/src/main/kotlin/com/whelksoft/flutter_native_timezone/FlutterNativeTimezonePlugin.kt
@@ -3,7 +3,7 @@ package com.whelksoft.flutter_native_timezone
 import androidx.annotation.NonNull
 import io.flutter.embedding.engine.plugins.FlutterPlugin
 import io.flutter.plugin.common.BinaryMessenger
-import java.util.TimeZone
+import java.time.ZoneId
 import io.flutter.plugin.common.MethodCall
 import io.flutter.plugin.common.MethodChannel
 import io.flutter.plugin.common.MethodChannel.MethodCallHandler
@@ -34,10 +34,11 @@ class FlutterNativeTimezonePlugin: FlutterPlugin, MethodCallHandler {
   override fun onMethodCall(call: MethodCall, result: Result) {
     when (call.method) {
       "getLocalTimezone" -> {
-        result.success(TimeZone.getDefault().id)
+        val zone: ZoneId = ZoneId.systemDefault()
+        result.success(zone.id)
       }
       "getAvailableTimezones" -> {
-        result.success(TimeZone.getAvailableIDs().toCollection(ArrayList()))
+        result.success(ZoneId.getAvailableZoneIds().toCollection(ArrayList()))
       }
       else -> {
         result.notImplemented()
diff --git a/example/lib/main.dart b/example/lib/main.dart
index 750609e..79373e5 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -28,6 +28,7 @@ class _MyAppState extends State<MyApp> {
     }
     try {
       _availableTimezones = await FlutterNativeTimezone.getAvailableTimezones();
+      _availableTimezones.sort();
     } catch (e) {
       print('Could not get available timezones');
     }
diff --git a/pubspec.yaml b/pubspec.yaml
index 9987c6f..e863d72 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -12,6 +12,7 @@ dependencies:
     sdk: flutter
   flutter:
     sdk: flutter
+  js: ^0.6.3
 
 dev_dependencies:
   flutter_test: