diff --git a/Runtime/AvatarCreator/JsonHelpers/BodyTypeConverter.cs b/Runtime/AvatarCreator/JsonHelpers/BodyTypeConverter.cs
index 8304abd3..b6d30fcd 100644
--- a/Runtime/AvatarCreator/JsonHelpers/BodyTypeConverter.cs
+++ b/Runtime/AvatarCreator/JsonHelpers/BodyTypeConverter.cs
@@ -2,9 +2,11 @@
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 using ReadyPlayerMe.Core;
+using UnityEngine.Scripting;
 
 namespace ReadyPlayerMe.AvatarCreator
 {
+    [Preserve]
     public class BodyTypeConverter : JsonConverter<BodyType>
     {
         private const string FULL_BODY = "fullbody";
diff --git a/Runtime/AvatarCreator/JsonHelpers/GenderConverter.cs b/Runtime/AvatarCreator/JsonHelpers/GenderConverter.cs
index ad987750..b0eb64bd 100644
--- a/Runtime/AvatarCreator/JsonHelpers/GenderConverter.cs
+++ b/Runtime/AvatarCreator/JsonHelpers/GenderConverter.cs
@@ -2,9 +2,11 @@
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 using ReadyPlayerMe.Core;
+using UnityEngine.Scripting;
 
 namespace ReadyPlayerMe.AvatarCreator
 {
+    [Preserve]
     public class GenderConverter : JsonConverter
     {
         private const string MALE = "male";
diff --git a/Runtime/AvatarCreator/JsonHelpers/PartnerAssetsDictionaryConverter.cs b/Runtime/AvatarCreator/JsonHelpers/PartnerAssetsDictionaryConverter.cs
index 893b5388..78530d9e 100644
--- a/Runtime/AvatarCreator/JsonHelpers/PartnerAssetsDictionaryConverter.cs
+++ b/Runtime/AvatarCreator/JsonHelpers/PartnerAssetsDictionaryConverter.cs
@@ -2,9 +2,11 @@
 using System.Collections.Generic;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
+using UnityEngine.Scripting;
 
 namespace ReadyPlayerMe.AvatarCreator
 {
+    [Preserve]
     public class CategoryDictionaryConverter : JsonConverter<Dictionary<Category, object>>
     {
         public override void WriteJson(JsonWriter writer, Dictionary<Category, object> value, JsonSerializer serializer)
diff --git a/Runtime/Data/ApplicationData.cs b/Runtime/Data/ApplicationData.cs
index da579fe3..b45c8b19 100644
--- a/Runtime/Data/ApplicationData.cs
+++ b/Runtime/Data/ApplicationData.cs
@@ -6,7 +6,7 @@ namespace ReadyPlayerMe.Core
 {
     public static class ApplicationData
     {
-        private const string SDK_VERSION = "v4.1.0";
+        private const string SDK_VERSION = "v4.1.1";
         private const string TAG = "ApplicationData";
         private const string DEFAULT_RENDER_PIPELINE = "Built-In Render Pipeline";
         private static readonly AppData Data;
diff --git a/package.json b/package.json
index 2fa472ce..361f6885 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "com.readyplayerme.core",
-  "version": "4.1.0",
+  "version": "4.1.1",
   "displayName": "Ready Player Me Core",
   "description": "This Module contains all the core functionality required for using Ready Player Me avatars in Unity, including features such as: \n - Module management and automatic package setup logic\n - Avatar loading from .glb files \n - Avatar creation \n - Avatar and 2D render requests \n - Optional Analytics\n - Custom editor windows\n - Sample scenes and assets",
   "unity": "2020.3",