diff --git a/Scripts/Format/glTF_VRM_BlendShape.cs b/Scripts/Format/glTF_VRM_BlendShape.cs
index 7338872c2..3dff1e1d2 100644
--- a/Scripts/Format/glTF_VRM_BlendShape.cs
+++ b/Scripts/Format/glTF_VRM_BlendShape.cs
@@ -27,8 +27,13 @@ namespace VRM
     [JsonSchema(Title = "vrm.blendshape.bind")]
     public class glTF_VRM_BlendShapeBind : UniGLTF.JsonSerializableBase
     {
+        [JsonSchema(Required = true, Minimum = 0)]
         public int mesh = -1;
+
+        [JsonSchema(Required = true, Minimum = 0)]
         public int index = -1;
+
+        [JsonSchema(Required =true, Minimum = 0, Maximum = 100, Description = @"SkinnedMeshRenderer.SetBlendShapeWeight")]
         public float weight = 0;
 
         protected override void SerializeMembers(GLTFJsonFormatter f)
diff --git a/UniGLTF b/UniGLTF
index 71188cbb8..94a186fd6 160000
--- a/UniGLTF
+++ b/UniGLTF
@@ -1 +1 @@
-Subproject commit 71188cbb88eced710c7c1c550bbde09d756ecc3a
+Subproject commit 94a186fd656ddac63363751cb3e7e9f6fe8d647b
diff --git a/specification/0.0/schema/vrm.blendshape.bind.schema.json b/specification/0.0/schema/vrm.blendshape.bind.schema.json
index 2a3032957..d5a8525a8 100644
--- a/specification/0.0/schema/vrm.blendshape.bind.schema.json
+++ b/specification/0.0/schema/vrm.blendshape.bind.schema.json
@@ -3,13 +3,18 @@
     "type": "object",
     "properties": {
         "mesh": {
-            "type": "integer"
+            "type": "integer",
+            "minimum": 0
         },
         "index": {
-            "type": "integer"
+            "type": "integer",
+            "minimum": 0
         },
         "weight": {
-            "type": "number"
+            "description": "SkinnedMeshRenderer.SetBlendShapeWeight",
+            "type": "number",
+            "minimum": 0,
+            "maximum": 100
         }
     }
 }
\ No newline at end of file
diff --git a/specification/0.0/schema/vrm.blendshape.group.schema.json b/specification/0.0/schema/vrm.blendshape.group.schema.json
index d90f6a252..c864cc61d 100644
--- a/specification/0.0/schema/vrm.blendshape.group.schema.json
+++ b/specification/0.0/schema/vrm.blendshape.group.schema.json
@@ -24,6 +24,10 @@
             "items": {
                 "$ref": "vrm.blendshape.materialbind.schema.json"
             }
+        },
+        "isBinary": {
+            "description": "0 or 1. Do not allow an intermediate value. Value should rounded",
+            "type": "boolean"
         }
     }
 }
\ No newline at end of file
diff --git a/specification/0.0/schema/vrm.firstperson.schema.json b/specification/0.0/schema/vrm.firstperson.schema.json
index 97823801f..ec8a488b4 100644
--- a/specification/0.0/schema/vrm.firstperson.schema.json
+++ b/specification/0.0/schema/vrm.firstperson.schema.json
@@ -3,7 +3,7 @@
     "type": "object",
     "properties": {
         "firstPersonBone": {
-            "description": "Specify a bone whose rendering mode should be switched in first-person view. Usually Head is specified.",
+            "description": "The bone whose rendering should be turned off in first-person view. Usually Head is specified.",
             "type": "integer"
         },
         "firstPersonBoneOffset": {
diff --git a/specification/0.0/schema/vrm.schema.json b/specification/0.0/schema/vrm.schema.json
index 04c130288..b53185634 100644
--- a/specification/0.0/schema/vrm.schema.json
+++ b/specification/0.0/schema/vrm.schema.json
@@ -4,7 +4,7 @@
     "type": "object",
     "properties": {
         "exporterVersion": {
-            "description": "Version of exporter that vrm created. UniVRM-0.44",
+            "description": "Version of exporter that vrm created. UniVRM-0.46",
             "type": "string"
         },
         "meta": {