diff --git a/Sources/Model/Case.cs b/Sources/Model/Case.cs
index fd76ae2..f9ba7f3 100644
--- a/Sources/Model/Case.cs
+++ b/Sources/Model/Case.cs
@@ -26,7 +26,7 @@ namespace Model
 
         public Case()
         {
-
+            Valeur = 0;
         }
 
         public Case(int valeur)
diff --git a/Sources/Model/Game.cs b/Sources/Model/Game.cs
index 494dfe2..3a69f74 100644
--- a/Sources/Model/Game.cs
+++ b/Sources/Model/Game.cs
@@ -45,15 +45,26 @@ namespace Model
         public Game(DateTime date, Player ?owner, GameMode gameMode, int id = 0)
         {
             Date = date;
+
+            // Creation list de player + ajout d'une player owner dans la liste
             players = new();
-            turns = new();
             Players = new ReadOnlyCollection<Player>(players);
-            Grilles = new ReadOnlyDictionary<Player, Grille>(new Dictionary<Player, Grille>());
-            Scores = new ReadOnlyDictionary<Player, int>(new Dictionary<Player, int>());
-            Turns = new ReadOnlyCollection<Turn>(turns);
-            grilles.Add(owner, new Grille());
-            scores.Add(owner, 0);
             players.Add(owner);
+
+            turns = new();
+            Turns = new ReadOnlyCollection<Turn>(turns);
+
+            if(grilles != null)
+            {
+                Grilles = new ReadOnlyDictionary<Player, Grille>(new Dictionary<Player, Grille>());
+                grilles.Add(owner, new Grille());
+            }
+
+            if(scores != null)
+            {
+                Scores = new ReadOnlyDictionary<Player, int>(new Dictionary<Player, int>());
+                scores.Add(owner, 0);
+            } 
             GameMode = gameMode;
             Id = id;
         }
diff --git a/Sources/Stub/Stub/StubData.Games.cs b/Sources/Stub/Stub/StubData.Games.cs
index c0bdd3e..c5e4a85 100644
--- a/Sources/Stub/Stub/StubData.Games.cs
+++ b/Sources/Stub/Stub/StubData.Games.cs
@@ -13,10 +13,10 @@ namespace Stub
     {
         private List<Game> games = new()
         {
-            new Game(new DateTime(), new Player("Aurélien",0),new GameMode()),
-            new Game(new DateTime(), new Player("Maxence",1),new GameMode()),
-            new Game(new DateTime(), new Player("Théo",2),new GameMode()),
-            new Game(new DateTime(), new Player("Zakariya",3),new GameMode()),
+            new Game(new DateTime(), new Player("Aurélien",0),new GameMode(),1),
+            new Game(new DateTime(), new Player("Maxence",1),new GameMode(),2),
+            new Game(new DateTime(), new Player("Théo",2),new GameMode(),3),
+            new Game(new DateTime(), new Player("Zakariya",3),new GameMode(),4),
         };
 
         public class GamesManager : IGamesManager
diff --git a/Sources/Trek12_API/Controllers/GameController.cs b/Sources/Trek12_API/Controllers/GameController.cs
index c7d0de5..4aeec20 100644
--- a/Sources/Trek12_API/Controllers/GameController.cs
+++ b/Sources/Trek12_API/Controllers/GameController.cs
@@ -11,7 +11,7 @@ namespace Trek12_API.Controllers
     public class GameController: ControllerBase
     {
         private readonly ILogger<GameController> _logger;
-        private StubData.GamesManager gamesManager { get; set; } = new StubData.GamesManager(new StubData());
+        private GamesManager gamesManager { get; set; } = new StubData.GamesManager(new StubData());
 
 
         public GameController(ILogger<GameController> logger)
diff --git a/Sources/Trek12_API/Converter/PlayerConverter.cs b/Sources/Trek12_API/Converter/PlayerConverter.cs
index d4099bb..6cca230 100644
--- a/Sources/Trek12_API/Converter/PlayerConverter.cs
+++ b/Sources/Trek12_API/Converter/PlayerConverter.cs
@@ -1,4 +1,5 @@
-using Model;
+using System.Text.Json.Serialization;
+using Model;
 using Trek12_API.DTO;
 
 namespace Trek12_API.Converter
diff --git a/Sources/Trek12_API/JsonConverter/ReadOnlyDictionnaryConverter.cs b/Sources/Trek12_API/JsonConverter/ReadOnlyDictionnaryConverter.cs
new file mode 100644
index 0000000..5a7b3ff
--- /dev/null
+++ b/Sources/Trek12_API/JsonConverter/ReadOnlyDictionnaryConverter.cs
@@ -0,0 +1,23 @@
+using System;
+using System.Collections.ObjectModel;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace Trek12_API.JsonConverter
+{
+	public class ReadOnlyDictionnaryConverter<TKey,TValue>: JsonConverter<ReadOnlyDictionary<TKey,TValue>>
+	{
+        public override ReadOnlyDictionary<TKey, TValue>? Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            Dictionary<TKey, TValue> dictionary = JsonSerializer.Deserialize<Dictionary<TKey, TValue>>(ref reader, options);
+            return new ReadOnlyDictionary<TKey, TValue>(dictionary);
+        }
+
+        public override void Write(Utf8JsonWriter writer, ReadOnlyDictionary<TKey, TValue> value, JsonSerializerOptions options)
+        {
+            JsonSerializer.Serialize(writer, value.ToDictionary(kv => kv.Key, kv => kv.Value),options);
+        }
+
+    }
+}
+
diff --git a/Sources/Trek12_API/Program.cs b/Sources/Trek12_API/Program.cs
index 62b4262..3ec7642 100644
--- a/Sources/Trek12_API/Program.cs
+++ b/Sources/Trek12_API/Program.cs
@@ -1,12 +1,20 @@
-var builder = WebApplication.CreateBuilder(args);
+using Model;
+using Trek12_API.JsonConverter;
+
+var builder = WebApplication.CreateBuilder(args);
 
 // Add services to the container.
 
-builder.Services.AddControllers();
 // Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
 builder.Services.AddEndpointsApiExplorer();
 builder.Services.AddSwaggerGen();
 
+builder.Services.AddControllers().AddJsonOptions(options =>
+{
+    options.JsonSerializerOptions.Converters.Add(new ReadOnlyDictionnaryConverter<Player, Grille>());
+    options.JsonSerializerOptions.Converters.Add(new ReadOnlyDictionnaryConverter<int, Player>());
+});
+
 var app = builder.Build();
 
 // Configure the HTTP request pipeline.
diff --git a/Sources/Trek12_API/Trek12_API.csproj b/Sources/Trek12_API/Trek12_API.csproj
index 009f215..27ce4c2 100644
--- a/Sources/Trek12_API/Trek12_API.csproj
+++ b/Sources/Trek12_API/Trek12_API.csproj
@@ -16,4 +16,10 @@
     <ProjectReference Include="..\Stub\Stub\Stub.csproj" />
   </ItemGroup>
 
+  <ItemGroup>
+    <None Remove="JsonConverter\" />
+  </ItemGroup>
+  <ItemGroup>
+    <Folder Include="JsonConverter\" />
+  </ItemGroup>
 </Project>
diff --git a/Sources/Trek12_Lib/EntityFrameWorkLib.csproj b/Sources/Trek12_Lib/EntityFrameWorkLib.csproj
index b8e4722..473649d 100644
--- a/Sources/Trek12_Lib/EntityFrameWorkLib.csproj
+++ b/Sources/Trek12_Lib/EntityFrameWorkLib.csproj
@@ -13,9 +13,9 @@
     <None Remove="Microsoft.EntityFrameworkCore.Tools" />
   </ItemGroup>
   <ItemGroup>
-    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="7.0.2" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="7.0.2" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="7.0.2">
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="7.0.4" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="7.0.4" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="7.0.4">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>