diff --git a/ProjBobcat/ProjBobcat/Class/Model/Fabric/FabricLoaderArtifactModel.cs b/ProjBobcat/ProjBobcat/Class/Model/Fabric/FabricLoaderArtifactModel.cs
index 6c34367c..228b3036 100644
--- a/ProjBobcat/ProjBobcat/Class/Model/Fabric/FabricLoaderArtifactModel.cs
+++ b/ProjBobcat/ProjBobcat/Class/Model/Fabric/FabricLoaderArtifactModel.cs
@@ -9,5 +9,5 @@ public class FabricLoaderArtifactModel
     [JsonPropertyName("launcherMeta")] public FabricLauncherMeta LauncherMeta { get; set; }
 }
 
-[JsonSerializable(typeof(FabricLoaderArtifactModel[]))]
+[JsonSerializable(typeof(FabricLoaderArtifactModel))]
 public partial class FabricLoaderArtifactModelContext : JsonSerializerContext {}
\ No newline at end of file
diff --git a/ProjBobcat/ProjBobcat/Class/Model/NeoForge/NeoForgeVersionsModel.cs b/ProjBobcat/ProjBobcat/Class/Model/NeoForge/NeoForgeVersionsModel.cs
index fa32028e..a7e38696 100644
--- a/ProjBobcat/ProjBobcat/Class/Model/NeoForge/NeoForgeVersionsModel.cs
+++ b/ProjBobcat/ProjBobcat/Class/Model/NeoForge/NeoForgeVersionsModel.cs
@@ -9,5 +9,5 @@ public class NeoForgeVersionModel
     [JsonPropertyName("mcversion")] public string MineCraftVersion { get; set; }
 }
 
-[JsonSerializable(typeof(NeoForgeVersionModel[]))]
+[JsonSerializable(typeof(NeoForgeVersionModel))]
 public partial class NeoForgeVersionsModelContext : JsonSerializerContext { }
\ No newline at end of file
diff --git a/ProjBobcat/ProjBobcat/Class/Model/Optifine/OptifineDownloadVersionModel.cs b/ProjBobcat/ProjBobcat/Class/Model/Optifine/OptifineDownloadVersionModel.cs
index bb931956..683fb4e0 100644
--- a/ProjBobcat/ProjBobcat/Class/Model/Optifine/OptifineDownloadVersionModel.cs
+++ b/ProjBobcat/ProjBobcat/Class/Model/Optifine/OptifineDownloadVersionModel.cs
@@ -5,12 +5,12 @@ namespace ProjBobcat.Class.Model.Optifine;
 public class OptifineDownloadVersionModel
 {
     [JsonPropertyName("_id")] public string Id { get; set; }
-    [JsonPropertyName("mcversion")] public string McVersion { get; set; }
-    [JsonPropertyName("patch")] public string Patch { get; set; }
-    [JsonPropertyName("type")] public string Type { get; set; }
+    [JsonPropertyName("mcversion")] public string? McVersion { get; set; }
+    [JsonPropertyName("patch")] public string? Patch { get; set; }
+    [JsonPropertyName("type")] public string? Type { get; set; }
     [JsonPropertyName("__v")] public int VersionLocker { get; set; }
     [JsonPropertyName("filename")] public string FileName { get; set; }
 }
 
-[JsonSerializable(typeof(OptifineDownloadVersionModel[]))]
+[JsonSerializable(typeof(OptifineDownloadVersionModel))]
 public partial class OptifineDownloadVersionModelContext : JsonSerializerContext {}
\ No newline at end of file
diff --git a/ProjBobcat/ProjBobcat/Class/Model/Quilt/QuiltLoaderModel.cs b/ProjBobcat/ProjBobcat/Class/Model/Quilt/QuiltLoaderModel.cs
index e615b507..2dae2d03 100644
--- a/ProjBobcat/ProjBobcat/Class/Model/Quilt/QuiltLoaderModel.cs
+++ b/ProjBobcat/ProjBobcat/Class/Model/Quilt/QuiltLoaderModel.cs
@@ -13,5 +13,5 @@ public class QuiltLoaderModel
     [JsonPropertyName("version")] public string Version { get; set; }
 }
 
-[JsonSerializable(typeof(QuiltLoaderModel[]))]
+[JsonSerializable(typeof(QuiltLoaderModel))]
 public partial class QuiltLoaderModelContext : JsonSerializerContext {}
\ No newline at end of file