diff --git a/Packages/com.skymavis.axiemixer.unity/Runtime/Components/Builder/Axie2dBuilder.cs b/Packages/com.skymavis.axiemixer.unity/Runtime/Components/Builder/Axie2dBuilder.cs
index 6d0a83af..825a47f9 100644
--- a/Packages/com.skymavis.axiemixer.unity/Runtime/Components/Builder/Axie2dBuilder.cs
+++ b/Packages/com.skymavis.axiemixer.unity/Runtime/Components/Builder/Axie2dBuilder.cs
@@ -195,7 +195,13 @@ SkeletonDataAsset CreateMixedSkeletonDataAsset(MixedSkeletonData mixed, float sc
                     Scale = scale
                 };
                 var loadedSkeletonData = skeletonMixed.ReadSkeletonData(mixed, true);
-                skeletonDataAsset.InitializeWithData(loadedSkeletonData);
+                
+                //phuongnk - cheat to call internal function
+                skeletonDataAsset.skeletonJSON = new TextAsset();
+                Type thisType = skeletonDataAsset.GetType();
+                var theMethod = thisType.GetMethod("InitializeWithData", BindingFlags.NonPublic | BindingFlags.Public | BindingFlags.Instance);
+                theMethod.Invoke(skeletonDataAsset, new object[] { loadedSkeletonData });
+                // skeletonDataAsset.InitializeWithData(loadedSkeletonData);
 
                 return skeletonDataAsset;
             }
diff --git a/Packages/com.skymavis.axiemixer.unity/package.json b/Packages/com.skymavis.axiemixer.unity/package.json
index 98b209de..db132834 100644
--- a/Packages/com.skymavis.axiemixer.unity/package.json
+++ b/Packages/com.skymavis.axiemixer.unity/package.json
@@ -1,6 +1,6 @@
 {
   "name": "com.skymavis.axiemixer.unity",
-  "version": "0.6.3",
+  "version": "0.6.4",
   "displayName": "Axie Mixer",
   "description": "Core library for mixing Axie's parts together.",
   "unity": "2020.3"
diff --git a/ProjectSettings/ProjectSettings.asset b/ProjectSettings/ProjectSettings.asset
index f1ee15a7..c88b30a9 100644
--- a/ProjectSettings/ProjectSettings.asset
+++ b/ProjectSettings/ProjectSettings.asset
@@ -134,7 +134,7 @@ PlayerSettings:
     16:10: 1
     16:9: 1
     Others: 1
-  bundleVersion: 0.6.3
+  bundleVersion: 0.6.4
   preloadedAssets: []
   metroInputSource: 0
   wsaTransparentSwapchain: 0