diff --git a/Scripts/PreExportShaderProps/VRMPreShaderPropExporter.cs b/Scripts/PreExportShaderProps/VRMPreShaderPropExporter.cs
index a0e5390de..7cff9cdb6 100644
--- a/Scripts/PreExportShaderProps/VRMPreShaderPropExporter.cs
+++ b/Scripts/PreExportShaderProps/VRMPreShaderPropExporter.cs
@@ -3,10 +3,11 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Reflection;
-using System.Text;
 using UniGLTF;
-using UnityEditor;
 using UnityEngine;
+#if UNITY_EDITOR
+using UnityEditor;
+#endif
 
 
 namespace VRM