diff --git a/android/app/build.gradle b/android/app/build.gradle
index 5530bd7..008e1ff 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -25,7 +25,7 @@ apply plugin: 'com.android.application'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 27
+    compileSdkVersion 28
 
     lintOptions {
         disable 'InvalidPackage'
diff --git a/android/gradle.properties b/android/gradle.properties
index 8bd86f6..7be3d8b 100644
--- a/android/gradle.properties
+++ b/android/gradle.properties
@@ -1 +1,2 @@
 org.gradle.jvmargs=-Xmx1536M
+android.enableR8=true
diff --git a/ios/Flutter/flutter_export_environment.sh b/ios/Flutter/flutter_export_environment.sh
new file mode 100644
index 0000000..59af148
--- /dev/null
+++ b/ios/Flutter/flutter_export_environment.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+# This is a generated file; do not edit or check into version control.
+export "FLUTTER_ROOT=C:\src\flutter\flutter"
+export "FLUTTER_APPLICATION_PATH=C:\Users\Marcelo\usr\apps\flutter\flutter-bloc-library-tutorial"
+export "FLUTTER_TARGET=lib\main.dart"
+export "FLUTTER_BUILD_DIR=build"
+export "SYMROOT=${SOURCE_ROOT}/../build\ios"
+export "OTHER_LDFLAGS=$(inherited) -framework Flutter"
+export "FLUTTER_FRAMEWORK_DIR=C:\src\flutter\flutter\bin\cache\artifacts\engine\ios"
+export "FLUTTER_BUILD_NAME=1.0.0"
+export "FLUTTER_BUILD_NUMBER=1"
+export "DART_OBFUSCATION=false"
+export "TRACK_WIDGET_CREATION=false"
+export "TREE_SHAKE_ICONS=false"
+export "PACKAGE_CONFIG=.packages"
diff --git a/lib/counter_bloc.dart b/lib/counter_bloc.dart
index 2a69564..b519bbd 100644
--- a/lib/counter_bloc.dart
+++ b/lib/counter_bloc.dart
@@ -4,11 +4,11 @@ import 'package:bloc_library_tut/counter_state.dart';
 
 class CounterBloc extends Bloc<CounterEvent, CounterState> {
   void onIncrement() {
-    dispatch(IncrementEvent());
+    add(IncrementEvent());
   }
 
   void onDecrement() {
-    dispatch(DecrementEvent());
+    add(DecrementEvent());
   }
 
   @override
@@ -16,7 +16,7 @@ class CounterBloc extends Bloc<CounterEvent, CounterState> {
 
   @override
   Stream<CounterState> mapEventToState(CounterEvent event) async* {
-    final _currentState = currentState;
+    final _currentState = state;
     if (event is IncrementEvent) {
       yield CounterState(counter: _currentState.counter + 1);
     } else if (event is DecrementEvent) {
diff --git a/lib/main.dart b/lib/main.dart
index 5b48ea2..acf347e 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -33,16 +33,21 @@ class _MyHomePageState extends State<MyHomePage> {
   @override
   Widget build(BuildContext context) {
     return BlocProvider(
-      bloc: _counterBloc,
+      create: (BuildContext context) => _counterBloc,
       child: CounterWidget(widget: widget),
     );
   }
 
-  @override
-  void dispose() {
-    _counterBloc.dispose();
-    super.dispose();
-  }
+  // @override
+  // void dispose() {
+  //   _counterBloc.dispose();
+  //   super.dispose();
+  // }
+
+  /*
+  * Since flutter_bloc 0.19.0
+  * BlocProvider will now handle automatically disposing of blocs for you
+  * */
 }
 
 class CounterWidget extends StatelessWidget {
diff --git a/pubspec.yaml b/pubspec.yaml
index 3bf45c1..8c88731 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -15,7 +15,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
-  flutter_bloc: ^0.6.0
+  flutter_bloc: ^4.0.0
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.