diff --git a/Scripts/Format/VRMFormat.cs b/Scripts/Format/VRMFormat.cs
index ee31f697c..811b6dd10 100644
--- a/Scripts/Format/VRMFormat.cs
+++ b/Scripts/Format/VRMFormat.cs
@@ -17,7 +17,6 @@ namespace UniGLTF
         }
     }
 
-    [Serializable]
     public partial class glTF_extensions : JsonSerializableBase
     {
         public VRM.glTF_VRM_extensions VRM = new VRM.glTF_VRM_extensions();
diff --git a/UniGLTF b/UniGLTF
index bb3c0d701..c0902e94e 160000
--- a/UniGLTF
+++ b/UniGLTF
@@ -1 +1 @@
-Subproject commit bb3c0d701f507e78e71440f80a66f9ad29892f92
+Subproject commit c0902e94e4db7029c9a7d1eb505d732b216ebbfa