diff --git a/lib/main.dart b/lib/main.dart
index 570afe1..f08a5d4 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -17,7 +17,96 @@ class MyApp extends StatelessWidget {
         visualDensity: VisualDensity.adaptivePlatformDensity,
         scaffoldBackgroundColor: Palette.scaffold,
       ),
+
+      home: MyHomePage(title: 'Flutter Demo Home Page'),
+    );
+  }
+}
+
+class MyHomePage extends StatefulWidget {
+  MyHomePage({Key? key, required this.title}) : super(key: key);
+
+  // This widget is the home page of your application. It is stateful, meaning
+  // that it has a State object (defined below) that contains fields that affect
+  // how it looks.
+
+  // This class is the configuration for the state. It holds the values (in this
+  // case the title) provided by the parent (in this case the App widget) and
+  // used by the build method of the State. Fields in a Widget subclass are
+  // always marked "final".
+
+  final String title;
+
+  @override
+  _MyHomePageState createState() => _MyHomePageState();
+}
+
+class _MyHomePageState extends State<MyHomePage> {
+  int _counter = 0;
+
+  void _incrementCounter() {
+    setState(() {
+      // This call to setState tells the Flutter framework that something has
+      // changed in this State, which causes it to rerun the build method below
+      // so that the display can reflect the updated values. If we changed
+      // _counter without calling setState(), then the build method would not be
+      // called again, and so nothing would appear to happen.
+      _counter++;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    // This method is rerun every time setState is called, for instance as done
+    // by the _incrementCounter method above.
+    //
+    // The Flutter framework has been optimized to make rerunning build methods
+    // fast, so that you can just rebuild anything that needs updating rather
+    // than having to individually change instances of widgets.
+    return Scaffold(
+      appBar: AppBar(
+        // Here we take the value from the MyHomePage object that was created by
+        // the App.build method, and use it to set our appbar title.
+        title: Text(widget.title),
+      ),
+      body: Center(
+        // Center is a layout widget. It takes a single child and positions it
+        // in the middle of the parent.
+        child: Column(
+          // Column is also a layout widget. It takes a list of children and
+          // arranges them vertically. By default, it sizes itself to fit its
+          // children horizontally, and tries to be as tall as its parent.
+          //
+          // Invoke "debug painting" (press "p" in the console, choose the
+          // "Toggle Debug Paint" action from the Flutter Inspector in Android
+          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
+          // to see the wireframe for each widget.
+          //
+          // Column has various properties to control how it sizes itself and
+          // how it positions its children. Here we use mainAxisAlignment to
+          // center the children vertically; the main axis here is the vertical
+          // axis because Columns are vertical (the cross axis would be
+          // horizontal).
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            Text(
+              'You have pushed the button this many times:',
+            ),
+            Text(
+              '$_counter',
+              style: Theme.of(context).textTheme.headline4,
+            ),
+          ],
+        ),
+      ),
+      floatingActionButton: FloatingActionButton(
+        onPressed: _incrementCounter,
+        tooltip: 'Increment',
+        child: Icon(Icons.add),
+      ), // This trailing comma makes auto-formatting nicer for build methods.
+
       home: NavScreen(),
+
     );
   }
 }
diff --git a/lib/models/post_model.dart b/lib/models/post_model.dart
index 2520274..4460d9d 100644
--- a/lib/models/post_model.dart
+++ b/lib/models/post_model.dart
@@ -1,3 +1,4 @@
+// ignore: unused_import
 import 'package:meta/meta.dart';
 import 'package:flutter_facebook_responsive_ui/models/models.dart';
 
@@ -5,18 +6,18 @@ class Post {
   final User user;
   final String caption;
   final String timeAgo;
-  final String imageUrl;
+  final String? imageUrl;
   final int likes;
   final int comments;
   final int shares;
 
   const Post({
-    @required this.user,
-    @required this.caption,
-    @required this.timeAgo,
-    @required this.imageUrl,
-    @required this.likes,
-    @required this.comments,
-    @required this.shares,
+    required this.caption,
+    required this.timeAgo,
+    required this.user,
+    required this.imageUrl,
+    required this.likes,
+    required this.comments,
+    required this.shares,
   });
 }
diff --git a/lib/models/story_model.dart b/lib/models/story_model.dart
index c54b0ef..dfe5121 100644
--- a/lib/models/story_model.dart
+++ b/lib/models/story_model.dart
@@ -1,3 +1,4 @@
+// ignore: unused_import
 import 'package:meta/meta.dart';
 import 'package:flutter_facebook_responsive_ui/models/models.dart';
 
@@ -7,8 +8,8 @@ class Story {
   final bool isViewed;
 
   const Story({
-    @required this.user,
-    @required this.imageUrl,
+    required this.user,
+    required this.imageUrl,
     this.isViewed = false,
   });
 }
diff --git a/lib/models/user_model.dart b/lib/models/user_model.dart
index edaed23..3e04920 100644
--- a/lib/models/user_model.dart
+++ b/lib/models/user_model.dart
@@ -1,3 +1,4 @@
+// ignore: unused_import
 import 'package:meta/meta.dart';
 
 class User {
@@ -5,7 +6,7 @@ class User {
   final String imageUrl;
 
   const User({
-    @required this.name,
-    @required this.imageUrl,
+    required this.name,
+    required this.imageUrl,
   });
 }
diff --git a/pubspec.lock b/pubspec.lock
index be2a772..77f037d 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -7,96 +7,117 @@ packages:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.4.2"
+    version: "2.6.1"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0"
   cached_network_image:
     dependency: "direct main"
     description:
       name: cached_network_image
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.0+1"
+    version: "3.1.0"
+  cached_network_image_platform_interface:
+    dependency: transitive
+    description:
+      name: cached_network_image_platform_interface
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
+  cached_network_image_web:
+    dependency: transitive
+    description:
+      name: cached_network_image_web
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
   characters:
     dependency: transitive
     description:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.1.0"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.3"
+    version: "1.2.0"
   clock:
     dependency: transitive
     description:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.1"
+    version: "1.1.0"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.14.13"
-  convert:
-    dependency: transitive
-    description:
-      name: convert
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.1"
+    version: "1.15.0"
   crypto:
     dependency: transitive
     description:
       name: crypto
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.5"
+    version: "3.0.1"
   cupertino_icons:
     dependency: "direct main"
     description:
       name: cupertino_icons
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.3"
+    version: "1.0.3"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.2"
   file:
     dependency: transitive
     description:
       name: file
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.2.1"
+    version: "6.1.2"
   flutter:
     dependency: "direct main"
     description: flutter
     source: sdk
     version: "0.0.0"
+  flutter_blurhash:
+    dependency: transitive
+    description:
+      name: flutter_blurhash
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.6.0"
   flutter_cache_manager:
     dependency: transitive
     description:
       name: flutter_cache_manager
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.4.1"
+    version: "3.1.2"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -108,28 +129,21 @@ packages:
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.2"
+    version: "0.13.3"
   http_parser:
     dependency: transitive
     description:
       name: http_parser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.4"
-  intl:
-    dependency: transitive
-    description:
-      name: intl
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.16.1"
+    version: "4.0.0"
   matcher:
     dependency: transitive
     description:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.8"
+    version: "0.12.10"
   material_design_icons_flutter:
     dependency: "direct main"
     description:
@@ -143,77 +157,91 @@ packages:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.8"
+    version: "1.3.0"
+  octo_image:
+    dependency: transitive
+    description:
+      name: octo_image
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0+1"
   path:
     dependency: transitive
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.0"
   path_provider:
     dependency: transitive
     description:
       name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.11"
+    version: "2.0.2"
   path_provider_linux:
     dependency: transitive
     description:
       name: path_provider_linux
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.0.1+2"
+    version: "2.0.2"
   path_provider_macos:
     dependency: transitive
     description:
       name: path_provider_macos
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.0.4+3"
+    version: "2.0.2"
   path_provider_platform_interface:
     dependency: transitive
     description:
       name: path_provider_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.2"
+    version: "2.0.1"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.3"
   pedantic:
     dependency: transitive
     description:
       name: pedantic
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.0"
+    version: "1.11.1"
   platform:
     dependency: transitive
     description:
       name: platform
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.1"
+    version: "3.0.2"
   plugin_platform_interface:
     dependency: transitive
     description:
       name: plugin_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.2"
+    version: "2.0.1"
   process:
     dependency: transitive
     description:
       name: process
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.13"
+    version: "4.2.3"
   rxdart:
     dependency: transitive
     description:
       name: rxdart
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.24.1"
+    version: "0.27.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -225,91 +253,98 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.1"
   sqflite:
     dependency: transitive
     description:
       name: sqflite
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.1"
+    version: "2.0.0+3"
   sqflite_common:
     dependency: transitive
     description:
       name: sqflite_common
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.2+1"
+    version: "2.0.0+2"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.5"
+    version: "1.10.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.5"
+    version: "1.1.0"
   synchronized:
     dependency: transitive
     description:
       name: synchronized
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.0+2"
+    version: "3.0.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.17"
+    version: "0.3.0"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.0"
   uuid:
     dependency: transitive
     description:
       name: uuid
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.0"
+    version: "3.0.4"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.8"
+    version: "2.1.0"
+  win32:
+    dependency: transitive
+    description:
+      name: win32
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.5"
   xdg_directories:
     dependency: transitive
     description:
       name: xdg_directories
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.0"
+    version: "0.2.0"
 sdks:
-  dart: ">=2.9.0-14.0.dev <3.0.0"
-  flutter: ">=1.12.13+hotfix.5 <2.0.0"
+  dart: ">=2.13.0 <3.0.0"
+  flutter: ">=2.0.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 2c5e97a..0ce0156 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -18,7 +18,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 version: 1.0.0+1
 
 environment:
-  sdk: '>=2.7.0 <3.0.0'
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   flutter:
@@ -26,8 +26,8 @@ dependencies:
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
-  cupertino_icons: ^0.1.3
-  cached_network_image: ^2.2.0+1
+  cupertino_icons: ^1.0.3
+  cached_network_image: ^3.1.0
   material_design_icons_flutter: ^4.0.5345
 
 dev_dependencies: