diff --git a/android/gradle.properties b/android/gradle.properties
index 9a7fb493bbdeb67a67f6271e0418d25f7e2c9668..4818be8ca52a6781003f81fbeb0e73520e42eba3 100644
--- a/android/gradle.properties
+++ b/android/gradle.properties
@@ -1,5 +1,5 @@
 org.gradle.jvmargs=-Xmx1536M
 android.useAndroidX=true
 android.enableJetifier=true
-app.versionName=1.0.10
-app.versionCode=11
+app.versionName=1.0.11
+app.versionCode=12
diff --git a/lib/board.dart b/lib/board.dart
index 36eaa4f657c56d47f71ffdf7d20129cf8399e1e5..4502f08a237b134104ce4b0f304935b75c221405 100644
--- a/lib/board.dart
+++ b/lib/board.dart
@@ -3,7 +3,7 @@ import 'package:puissance4/coordinate.dart';
 import 'match_page.dart';
 
 class Board {
-  List<List<Color>> _boxes = List.generate(
+  List<List<Color?>> _boxes = List.generate(
     7,
     (i) => List.generate(
       7,
@@ -13,33 +13,34 @@ class Board {
 
   Board();
 
-  Board.from(List<List<Color>> boxes) {
+  Board.from(List<List<Color?>> boxes) {
     _boxes = boxes;
   }
 
-  Color getBox(Coordinate coordinate) => _boxes[coordinate.col][coordinate.row];
+  Color? getBox(Coordinate coordinate) =>
+      _boxes[coordinate.col ?? 0][coordinate.row ?? 0];
 
-  int getColumnTarget(int col) => _boxes[col].lastIndexOf(null);
+  int getColumnTarget(int? col) => _boxes[col ?? 0].lastIndexOf(null);
 
-  void setBox(Coordinate coordinate, Color player) =>
-      _boxes[coordinate.col][coordinate.row] = player;
+  void setBox(Coordinate coordinate, Color? player) =>
+      _boxes[coordinate.col ?? 0][coordinate.row ?? 0] = player;
 
   void reset() {
     _boxes.forEach((r) => r.forEach((p) => p = null));
   }
 
-  bool checkWinner(Coordinate coordinate, Color player) {
+  bool checkWinner(Coordinate coordinate, Color? player) {
     return checkHorizontally(coordinate, player) ||
         checkVertically(coordinate, player) ||
         checkDiagonally(coordinate, player);
   }
 
-  bool checkHorizontally(Coordinate coordinate, Color player) {
+  bool checkHorizontally(Coordinate coordinate, Color? player) {
     var r = 0;
     for (;
-        coordinate.col + r < 7 &&
+        (coordinate.col ?? 0) + r < 7 &&
             r < 4 &&
-            getBox(coordinate.copyWith(col: coordinate.col + r)) == player;
+            getBox(coordinate.copyWith(col: (coordinate.col ?? 0) + r)) == player;
         ++r) {}
     if (r >= 4) {
       return true;
@@ -47,9 +48,9 @@ class Board {
 
     var l = 0;
     for (;
-        coordinate.col - l >= 0 &&
+        (coordinate.col ?? 0) - l >= 0 &&
             l < 4 &&
-            getBox(coordinate.copyWith(col: coordinate.col - l)) == player;
+            getBox(coordinate.copyWith(col: (coordinate.col ?? 0) - l)) == player;
         ++l) {}
     if (l >= 4 || l + r >= 5) {
       return true;
@@ -58,15 +59,15 @@ class Board {
     return false;
   }
 
-  bool checkDiagonally(Coordinate coordinate, Color player) {
+  bool checkDiagonally(Coordinate coordinate, Color? player) {
     var ur = 0;
     for (;
-        coordinate.col + ur < 7 &&
-            coordinate.row + ur < 7 &&
+        (coordinate.col ?? 0) + ur < 7 &&
+            (coordinate.row ?? 0) + ur < 7 &&
             ur < 4 &&
             getBox(coordinate.copyWith(
-                  col: coordinate.col + ur,
-                  row: coordinate.row + ur,
+                  col: (coordinate.col ?? 0) + ur,
+                  row: (coordinate.row ?? 0) + ur,
                 )) ==
                 player;
         ++ur) {}
@@ -75,12 +76,12 @@ class Board {
     }
     var dl = 0;
     for (;
-        coordinate.col - dl >= 0 &&
-            coordinate.row - dl >= 0 &&
+        (coordinate.col ?? 0) - dl >= 0 &&
+            (coordinate.row ?? 0) - dl >= 0 &&
             dl < 4 &&
             getBox(coordinate.copyWith(
-                  col: coordinate.col - dl,
-                  row: coordinate.row - dl,
+                  col: (coordinate.col ?? 0) - dl,
+                  row: (coordinate.row ?? 0) - dl,
                 )) ==
                 player;
         ++dl) {}
@@ -90,12 +91,12 @@ class Board {
 
     var dr = 0;
     for (;
-        coordinate.col + dr < 7 &&
-            coordinate.row - dr >= 0 &&
+        (coordinate.col ?? 0) + dr < 7 &&
+            (coordinate.row ?? 0) - dr >= 0 &&
             dr < 4 &&
             getBox(coordinate.copyWith(
-                  col: coordinate.col + dr,
-                  row: coordinate.row - dr,
+                  col: (coordinate.col ?? 0) + dr,
+                  row: (coordinate.row ?? 0) - dr,
                 )) ==
                 player;
         ++dr) {}
@@ -105,12 +106,12 @@ class Board {
 
     var ul = 0;
     for (;
-        coordinate.col - ul >= 0 &&
-            coordinate.row + ul < 7 &&
+        (coordinate.col ?? 0) - ul >= 0 &&
+            (coordinate.row ?? 0) + ul < 7 &&
             ul < 4 &&
             getBox(coordinate.copyWith(
-                  col: coordinate.col - ul,
-                  row: coordinate.row + ul,
+                  col: (coordinate.col ?? 0) - ul,
+                  row: (coordinate.row ?? 0) + ul,
                 )) ==
                 player;
         ++ul) {}
@@ -120,13 +121,13 @@ class Board {
     return false;
   }
 
-  bool checkVertically(Coordinate coordinate, Color player) {
+  bool checkVertically(Coordinate coordinate, Color? player) {
     var u = 0;
     for (;
-        coordinate.row + u < 7 &&
+        (coordinate.row ?? 0) + u < 7 &&
             u < 4 &&
             getBox(coordinate.copyWith(
-                  row: coordinate.row + u,
+                  row: (coordinate.row ?? 0) + u,
                 )) ==
                 player;
         ++u) {}
@@ -135,10 +136,10 @@ class Board {
     }
     var d = 0;
     for (;
-        coordinate.row - d >= 0 &&
+        (coordinate.row ?? 0) - d >= 0 &&
             d < 4 &&
             getBox(coordinate.copyWith(
-                  row: coordinate.row - d,
+                  row: (coordinate.row ?? 0) - d,
                 )) ==
                 player;
         ++d) {}
diff --git a/lib/coordinate.dart b/lib/coordinate.dart
index c8cbca43fa33b8bcc32daca8e61f42f5975621b0..3d137c74442be8a8baf6d4d9c26e06edb46d6040 100644
--- a/lib/coordinate.dart
+++ b/lib/coordinate.dart
@@ -1,5 +1,5 @@
 class Coordinate {
-  final int row, col;
+  final int? row, col;
 
   Coordinate(
     this.col,
@@ -7,8 +7,8 @@ class Coordinate {
   );
 
   Coordinate copyWith({
-    int col,
-    int row,
+    int? col,
+    int? row,
   }) =>
       Coordinate(
         col ?? this.col,
diff --git a/lib/cpu.dart b/lib/cpu.dart
index cd5af2c2b18ec5dc9e8e0fe9d9be9feef94a26ce..7f91cf9445106aba094d3c6c0c14df873a0f3075 100644
--- a/lib/cpu.dart
+++ b/lib/cpu.dart
@@ -37,13 +37,13 @@ class HarderCpu extends Cpu {
 
   @override
   Future<int> chooseCol(Board board) async {
-    final List<double> scores = List.filled(7, 0);
+    final List<double?> scores = List.filled(7, 0.0);
 
     await Future.delayed(Duration(seconds: 1 + _random.nextInt(2)));
     return _compute(board, 0, 1, scores);
   }
 
-  int _compute(Board board, int step, int deepness, List<double> scores) {
+  int _compute(Board board, int step, int deepness, List<double?> scores) {
     for (var i = 0; i < 7; ++i) {
       final boardCopy = board.clone();
 
@@ -57,7 +57,7 @@ class HarderCpu extends Cpu {
 
       boardCopy.setBox(coordinate, color);
       if (boardCopy.checkWinner(coordinate, color)) {
-        scores[i] += deepness / (step + 1);
+        scores[i] = (scores[i] ?? 0) + deepness / (step + 1);
         continue;
       }
 
@@ -71,7 +71,7 @@ class HarderCpu extends Cpu {
 
         boardCopy.setBox(coordinate, otherPlayer);
         if (boardCopy.checkWinner(coordinate, otherPlayer)) {
-          scores[i] -= deepness / (step + 1);
+          scores[i] = (scores[i] ?? 0) - deepness / (step + 1);
           continue;
         }
 
@@ -84,11 +84,11 @@ class HarderCpu extends Cpu {
     return _getBestScoreIndex(scores);
   }
 
-  int _getBestScoreIndex(List<double> scores) {
+  int _getBestScoreIndex(List<double?> scores) {
     int bestScoreIndex = scores.indexWhere((s) => s != null);
     scores.asMap().forEach((index, score) {
       if (score != null &&
-          (score > scores[bestScoreIndex] ||
+          (score > (scores[bestScoreIndex] ?? 0) ||
               (score == scores[bestScoreIndex] && _random.nextBool()))) {
         bestScoreIndex = index;
       }
@@ -105,7 +105,7 @@ class HardestCpu extends HarderCpu {
 
   @override
   Future<int> chooseCol(Board board) async {
-    final List<double> scores = List.filled(7, 0);
+    final List<double?> scores = List.filled(7, 0);
 
     await Future.delayed(Duration(seconds: 2 + _random.nextInt(2)));
     return _compute(board, 0, 4, scores);
diff --git a/lib/cpu_level_page.dart b/lib/cpu_level_page.dart
index 0554af0e844af689ca8be72e65dcd761287bc14e..579158f7fbbef265c5f315fb364e47ce9cdfd0cf 100644
--- a/lib/cpu_level_page.dart
+++ b/lib/cpu_level_page.dart
@@ -19,15 +19,15 @@ class CpuLevelPage extends StatelessWidget {
           crossAxisAlignment: CrossAxisAlignment.center,
           mainAxisSize: MainAxisSize.max,
           children: <Widget>[
-            FlatButton(
-              color: Colors.yellow,
-              padding: EdgeInsets.all(15),
+            TextButton(
+              style: TextButton.styleFrom(
+                backgroundColor: Colors.yellow,
+                padding: EdgeInsets.all(15),
+              ),
               child: Text(
                 '☺️ FACILE',
-                style: Theme.of(context)
-                    .textTheme
-                    .headline4
-                    .copyWith(color: Colors.black),
+                style:
+                    Theme.of(context).textTheme.headline4?.copyWith(color: Colors.black),
               ),
               onPressed: () {
                 Navigator.pushNamed(
@@ -35,21 +35,20 @@ class CpuLevelPage extends StatelessWidget {
                   '/match',
                   arguments: {
                     'mode': Mode.PVC,
-                    'cpu':
-                        DumbCpu(Random().nextBool() ? Color.RED : Color.YELLOW),
+                    'cpu': DumbCpu(Random().nextBool() ? Color.RED : Color.YELLOW),
                   },
                 );
               },
             ),
-            FlatButton(
-              color: Colors.red,
-              padding: EdgeInsets.all(15),
+            TextButton(
+              style: TextButton.styleFrom(
+                backgroundColor: Colors.red,
+                padding: EdgeInsets.all(15),
+              ),
               child: Text(
                 '🤔 DIFFICILE',
-                style: Theme.of(context)
-                    .textTheme
-                    .headline4
-                    .copyWith(color: Colors.white),
+                style:
+                    Theme.of(context).textTheme.headline4?.copyWith(color: Colors.white),
               ),
               onPressed: () {
                 Navigator.pushNamed(
@@ -57,21 +56,20 @@ class CpuLevelPage extends StatelessWidget {
                   '/match',
                   arguments: {
                     'mode': Mode.PVC,
-                    'cpu': HarderCpu(
-                        Random().nextBool() ? Color.RED : Color.YELLOW),
+                    'cpu': HarderCpu(Random().nextBool() ? Color.RED : Color.YELLOW),
                   },
                 );
               },
             ),
-            FlatButton(
-              color: Colors.deepPurpleAccent,
-              padding: EdgeInsets.all(15),
+            TextButton(
+              style: TextButton.styleFrom(
+                backgroundColor: Colors.deepPurpleAccent,
+                padding: EdgeInsets.all(15),
+              ),
               child: Text(
                 '🤯 TRES DIFFICILE',
-                style: Theme.of(context)
-                    .textTheme
-                    .headline4
-                    .copyWith(color: Colors.white),
+                style:
+                    Theme.of(context).textTheme.headline4?.copyWith(color: Colors.white),
               ),
               onPressed: () {
                 Navigator.pushNamed(
@@ -79,8 +77,7 @@ class CpuLevelPage extends StatelessWidget {
                   '/match',
                   arguments: {
                     'mode': Mode.PVC,
-                    'cpu': HardestCpu(
-                        Random().nextBool() ? Color.RED : Color.YELLOW),
+                    'cpu': HardestCpu(Random().nextBool() ? Color.RED : Color.YELLOW),
                   },
                 );
               },
diff --git a/lib/game_chip.dart b/lib/game_chip.dart
index 1c737c3dd63e62cec0fa5a704d352deab644830f..65178cfa51503d63248f354e71b60dc589d42121 100644
--- a/lib/game_chip.dart
+++ b/lib/game_chip.dart
@@ -4,13 +4,13 @@ import 'match_page.dart';
 
 class GameChip extends StatelessWidget {
   const GameChip({
-    Key key,
+    Key? key,
     this.translation,
-    @required this.color,
+    this.color,
   }) : super(key: key);
 
-  final Animation<double> translation;
-  final Color color;
+  final Animation<double>? translation;
+  final Color? color;
 
   @override
   Widget build(BuildContext context) {
diff --git a/lib/home_page.dart b/lib/home_page.dart
index 7676f7eda26246c55bd6700b9395a76b648669c2..1db42a57d616fa9a285e63e2cfcf8e4c5603828b 100644
--- a/lib/home_page.dart
+++ b/lib/home_page.dart
@@ -16,15 +16,15 @@ class HomePage extends StatelessWidget {
           crossAxisAlignment: CrossAxisAlignment.center,
           mainAxisSize: MainAxisSize.max,
           children: <Widget>[
-            FlatButton(
-              color: Colors.green,
-              padding: EdgeInsets.all(15),
+            TextButton(
+              style: TextButton.styleFrom(
+                backgroundColor: Colors.green,
+                padding: EdgeInsets.all(15),
+              ),
               child: Text(
                 '🧑 2 JOUEURS 🧑',
-                style: Theme.of(context)
-                    .textTheme
-                    .headline4
-                    .copyWith(color: Colors.white),
+                style:
+                    Theme.of(context).textTheme.headline4?.copyWith(color: Colors.white),
               ),
               onPressed: () {
                 Navigator.pushNamed(
@@ -36,15 +36,15 @@ class HomePage extends StatelessWidget {
                 );
               },
             ),
-            FlatButton(
-              color: Colors.orange,
-              padding: EdgeInsets.all(15),
+            TextButton(
+              style: TextButton.styleFrom(
+                backgroundColor: Colors.orange,
+                padding: EdgeInsets.all(15),
+              ),
               child: Text(
                 '🧑 1 JOUEUR 🤖',
-                style: Theme.of(context)
-                    .textTheme
-                    .headline4
-                    .copyWith(color: Colors.white),
+                style:
+                    Theme.of(context).textTheme.headline4?.copyWith(color: Colors.white),
               ),
               onPressed: () {
                 Navigator.pushNamed(
@@ -56,15 +56,15 @@ class HomePage extends StatelessWidget {
                 );
               },
             ),
-            FlatButton(
-              color: Colors.white,
-              padding: EdgeInsets.all(15),
+            TextButton(
+              style: TextButton.styleFrom(
+                backgroundColor: Colors.white,
+                padding: EdgeInsets.all(15),
+              ),
               child: Text(
                 '🤖 DEMO 🤖',
-                style: Theme.of(context)
-                    .textTheme
-                    .headline4
-                    .copyWith(color: Colors.black),
+                style:
+                    Theme.of(context).textTheme.headline4?.copyWith(color: Colors.black),
               ),
               onPressed: () {
                 final harderCpu =
diff --git a/lib/main.dart b/lib/main.dart
index 19115a1ab134e8abfe9b50d25aa53f337d4720b2..09f7a1e6585f2a03598dbf558883a6d0a31760fe 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -14,7 +14,7 @@ class MyApp extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
-      title: 'Flutter fiar',
+      title: 'Puissance 4',
       theme: ThemeData(
         primarySwatch: Colors.blue,
       ),
diff --git a/lib/match_page.dart b/lib/match_page.dart
index db231b42baaf1b45a852dfb9c1d9562b6a6362c0..e18dbae318a0962d18a5c2902075f97394ae6545 100644
--- a/lib/match_page.dart
+++ b/lib/match_page.dart
@@ -21,14 +21,14 @@ enum Mode {
 
 class MatchPage extends StatefulWidget {
   final Mode mode;
-  final Cpu cpu;
-  final Cpu cpu2;
+  final Cpu? cpu;
+  final Cpu? cpu2;
 
   const MatchPage({
-    Key key,
-    this.mode,
-    this.cpu,
-    this.cpu2,
+    Key? key,
+    required this.mode,
+    required this.cpu,
+    required this.cpu2,
   }) : super(key: key);
 
   @override
@@ -37,10 +37,10 @@ class MatchPage extends StatefulWidget {
 
 class _MatchPageState extends State<MatchPage> with TickerProviderStateMixin {
   final board = Board();
-  Color turn;
-  Color winner;
+  Color? turn;
+  Color? winner;
 
-  List<List<Animation<double>>> translations = List.generate(
+  List<List<Animation<double>?>> translations = List.generate(
     7,
     (i) => List.generate(
       7,
@@ -73,7 +73,6 @@ class _MatchPageState extends State<MatchPage> with TickerProviderStateMixin {
                 child: Padding(
                   padding: const EdgeInsets.only(top: 32.0),
                   child: Stack(
-                    overflow: Overflow.clip,
                     fit: StackFit.loose,
                     children: <Widget>[
                       Positioned.fill(
@@ -99,7 +98,7 @@ class _MatchPageState extends State<MatchPage> with TickerProviderStateMixin {
                         style: Theme.of(context)
                             .textTheme
                             .headline6
-                            .copyWith(color: Colors.white),
+                            ?.copyWith(color: Colors.white),
                       )
                     : Column(
                         children: <Widget>[
@@ -109,11 +108,13 @@ class _MatchPageState extends State<MatchPage> with TickerProviderStateMixin {
                             style: Theme.of(context)
                                 .textTheme
                                 .headline5
-                                .copyWith(color: Colors.white),
+                                ?.copyWith(color: Colors.white),
                           ),
                           Padding(
                             padding: const EdgeInsets.all(8.0),
-                            child: GameChip(color: turn),
+                            child: GameChip(
+                              color: turn,
+                            ),
                           ),
                           _buildPlayerName(context),
                         ],
@@ -130,7 +131,7 @@ class _MatchPageState extends State<MatchPage> with TickerProviderStateMixin {
     String name;
 
     if (widget.mode == Mode.PVC) {
-      if (turn == widget.cpu.color) {
+      if (turn == widget.cpu?.color) {
         name = 'CPU - ${widget.cpu.toString()}';
       } else {
         name = 'USER';
@@ -142,7 +143,7 @@ class _MatchPageState extends State<MatchPage> with TickerProviderStateMixin {
         name = 'PLAYER2';
       }
     } else {
-      if (turn == widget.cpu.color) {
+      if (turn == widget.cpu?.color) {
         name = 'CPU1 - ${widget.cpu.toString()}';
       } else {
         name = 'CPU2 - ${widget.cpu2.toString()}';
@@ -151,22 +152,18 @@ class _MatchPageState extends State<MatchPage> with TickerProviderStateMixin {
     return Text(
       name,
       textAlign: TextAlign.center,
-      style: Theme.of(context)
-        .textTheme
-        .headline5
-        .copyWith(color: Colors.white),
+      style: Theme.of(context).textTheme.headline5?.copyWith(color: Colors.white),
     );
   }
 
   @override
   void initState() {
     super.initState();
-    turn = widget.cpu?.otherPlayer ??
-        (Random().nextBool() ? Color.RED : Color.YELLOW);
-    if (widget.mode == Mode.PVC && turn == widget.cpu.color) {
+    turn = Random().nextBool() ? Color.RED : Color.YELLOW;
+    if (widget.mode == Mode.PVC && turn == widget.cpu?.color) {
       cpuMove(widget.cpu);
     } else if (widget.mode == Mode.DEMO) {
-      if (turn == widget.cpu.color) {
+      if (turn == widget.cpu?.color) {
         cpuMove(widget.cpu);
       } else {
         cpuMove(widget.cpu2);
@@ -179,8 +176,7 @@ class _MatchPageState extends State<MatchPage> with TickerProviderStateMixin {
       padding: const EdgeInsets.all(0),
       shrinkWrap: true,
       physics: NeverScrollableScrollPhysics(),
-      gridDelegate:
-          SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 7),
+      gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 7),
       childrenDelegate: SliverChildBuilderDelegate(
         (context, i) {
           final col = i % 7;
@@ -204,8 +200,7 @@ class _MatchPageState extends State<MatchPage> with TickerProviderStateMixin {
     return GridView.custom(
       padding: const EdgeInsets.all(0),
       physics: NeverScrollableScrollPhysics(),
-      gridDelegate:
-          SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 7),
+      gridDelegate: SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 7),
       shrinkWrap: true,
       childrenDelegate: SliverChildBuilderDelegate(
         (context, i) {
@@ -236,12 +231,12 @@ class _MatchPageState extends State<MatchPage> with TickerProviderStateMixin {
     }
   }
 
-  void cpuMove(Cpu cpu) async {
-    int col = await cpu.chooseCol(board);
+  void cpuMove(Cpu? cpu) async {
+    int? col = await cpu?.chooseCol(board);
     putChip(col);
 
     if (winner == null && widget.mode == Mode.DEMO) {
-      if (turn == widget.cpu.color) {
+      if (turn == widget.cpu?.color) {
         cpuMove(widget.cpu);
       } else {
         cpuMove(widget.cpu2);
@@ -249,7 +244,7 @@ class _MatchPageState extends State<MatchPage> with TickerProviderStateMixin {
     }
   }
 
-  void putChip(int col) {
+  void putChip(int? col) {
     final target = board.getColumnTarget(col);
     final player = turn;
 
@@ -273,7 +268,7 @@ class _MatchPageState extends State<MatchPage> with TickerProviderStateMixin {
       });
     }
 
-    translations[col][target] = Tween(
+    translations[col ?? 0][target] = Tween(
       begin: 0.0,
       end: 1.0,
     ).animate(CurvedAnimation(
@@ -293,7 +288,7 @@ class _MatchPageState extends State<MatchPage> with TickerProviderStateMixin {
     }
   }
 
-  void showWinnerDialog(BuildContext context, Color player) {
+  void showWinnerDialog(BuildContext context, Color? player) {
     setState(() {
       winner = player;
     });
diff --git a/pubspec.lock b/pubspec.lock
index 3317f5f8760ca76e88858ef443c38d580faf416e..7d27b51980f8e290e295bf9d2a7e3802ccf92fb8 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -42,14 +42,14 @@ packages:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.15.0"
+    version: "1.16.0"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -73,7 +73,7 @@ packages:
       name: material_color_utilities
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.3"
+    version: "0.1.4"
   meta:
     dependency: transitive
     description:
@@ -87,7 +87,7 @@ packages:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -99,7 +99,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.1"
+    version: "1.8.2"
   stack_trace:
     dependency: transitive
     description:
@@ -134,20 +134,13 @@ packages:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.8"
-  typed_data:
-    dependency: transitive
-    description:
-      name: typed_data
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.0"
+    version: "0.4.9"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.2"
 sdks:
-  dart: ">=2.14.0 <3.0.0"
+  dart: ">=2.17.0-0 <3.0.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 1867edeee01aba780127508b152e6a4feb936cb1..d6521c6afefc496d365d0cde9d1cbf64f0e91ee7 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -4,7 +4,7 @@ publish_to: 'none'
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.7.0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
   flutter: