diff --git a/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs b/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs
index 3e567953e..1f6a1c45b 100644
--- a/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs
+++ b/Assets/VRM10/Runtime/IO/Material/Vrm10MToonMaterialExporter.cs
@@ -10,8 +10,6 @@ namespace UniVRM10
 {
     public static class Vrm10MToonMaterialExporter
     {
-        const string MTOON_SPEC_VERSION = "1.0-beta";
-
         public static bool TryExportMaterialAsMToon(Material src, ITextureExporter textureExporter, out glTFMaterial dst)
         {
             if (src.shader.name != MToon10Meta.UnityShaderName)
@@ -30,7 +28,7 @@ namespace UniVRM10
 
             // vrmc_materials_mtoon ext
             var mtoon = new UniGLTF.Extensions.VRMC_materials_mtoon.VRMC_materials_mtoon();
-            mtoon.SpecVersion = MTOON_SPEC_VERSION;
+            mtoon.SpecVersion = Vrm10Exporter.MTOON_SPEC_VERSION;
 
             // Rendering
             dst.alphaMode = ExportAlphaMode(context.AlphaMode);
diff --git a/Assets/VRM10/Runtime/IO/Vrm10Exporter.cs b/Assets/VRM10/Runtime/IO/Vrm10Exporter.cs
index 39a7ba0f2..680780237 100644
--- a/Assets/VRM10/Runtime/IO/Vrm10Exporter.cs
+++ b/Assets/VRM10/Runtime/IO/Vrm10Exporter.cs
@@ -11,10 +11,10 @@ namespace UniVRM10
 {
     public class Vrm10Exporter : IDisposable
     {
-        public const string VRM_SPEC_VERSION = "1.0-beta";
-        public const string SPRINGBONE_SPEC_VERSION = "1.0-beta";
-        public const string NODE_CONSTRAINT_SPEC_VERSION = "1.0-beta";
-        public const string MTOON_SPEC_VERSION = "1.0-beta";
+        public const string VRM_SPEC_VERSION = "1.0";
+        public const string SPRINGBONE_SPEC_VERSION = "1.0";
+        public const string NODE_CONSTRAINT_SPEC_VERSION = "1.0";
+        public const string MTOON_SPEC_VERSION = "1.0";
 
         public const string LICENSE_URL_JA = "https://vrm.dev/licenses/1.0/";
         public const string LICENSE_URL_EN = "https://vrm.dev/licenses/1.0/en/";