diff --git a/Scripts/Format/VRMExporter.cs b/Scripts/Format/VRMExporter.cs
index b3a0f7147..abdc32d42 100644
--- a/Scripts/Format/VRMExporter.cs
+++ b/Scripts/Format/VRMExporter.cs
@@ -31,12 +31,6 @@ namespace VRM
                 }
             }
 
-            // update buffer size
-            foreach (var b in gltf.buffers)
-            {
-                b.UpdateByteLength();
-            }
-
             return gltf;
         }
 
diff --git a/UniGLTF b/UniGLTF
index 038b9900b..c8b19d3b8 160000
--- a/UniGLTF
+++ b/UniGLTF
@@ -1 +1 @@
-Subproject commit 038b9900be72da4af4aced100e1f7994fcad8f69
+Subproject commit c8b19d3b8332cadff434a58646610abe2618f3c8