diff --git a/Assets/FlashTools/Scripts/Editor/FTEditor/SwfPropertyDrawers.cs b/Assets/FlashTools/Scripts/Editor/FTEditor/SwfPropertyDrawers.cs
index 0086394..45c386e 100644
--- a/Assets/FlashTools/Scripts/Editor/FTEditor/SwfPropertyDrawers.cs
+++ b/Assets/FlashTools/Scripts/Editor/FTEditor/SwfPropertyDrawers.cs
@@ -5,6 +5,7 @@ using System.Linq;
 using System.Collections.Generic;
 
 using FTRuntime;
+using FTRuntime.Internal;
 
 namespace FTEditor {
 
diff --git a/Assets/FlashTools/Scripts/FTRuntime/SwfAttributes.cs b/Assets/FlashTools/Scripts/FTRuntime/Internal/SwfAttributes.cs
similarity index 97%
rename from Assets/FlashTools/Scripts/FTRuntime/SwfAttributes.cs
rename to Assets/FlashTools/Scripts/FTRuntime/Internal/SwfAttributes.cs
index 1a36c82..8797e62 100644
--- a/Assets/FlashTools/Scripts/FTRuntime/SwfAttributes.cs
+++ b/Assets/FlashTools/Scripts/FTRuntime/Internal/SwfAttributes.cs
@@ -1,6 +1,6 @@
 using UnityEngine;
 
-namespace FTRuntime {
+namespace FTRuntime.Internal {
 	public class SwfIntRangeAttribute : PropertyAttribute {
 		public int Min;
 		public int Max;
diff --git a/Assets/FlashTools/Scripts/FTRuntime/SwfAttributes.cs.meta b/Assets/FlashTools/Scripts/FTRuntime/Internal/SwfAttributes.cs.meta
similarity index 100%
rename from Assets/FlashTools/Scripts/FTRuntime/SwfAttributes.cs.meta
rename to Assets/FlashTools/Scripts/FTRuntime/Internal/SwfAttributes.cs.meta
diff --git a/Assets/FlashTools/Scripts/FTRuntime/SwfAsset.cs b/Assets/FlashTools/Scripts/FTRuntime/SwfAsset.cs
index 3bca5cd..6392701 100644
--- a/Assets/FlashTools/Scripts/FTRuntime/SwfAsset.cs
+++ b/Assets/FlashTools/Scripts/FTRuntime/SwfAsset.cs
@@ -1,4 +1,5 @@
 using UnityEngine;
+using FTRuntime.Internal;
 using System.Collections.Generic;
 
 namespace FTRuntime {
diff --git a/Assets/FlashTools/Scripts/FTRuntime/SwfSettings.cs b/Assets/FlashTools/Scripts/FTRuntime/SwfSettings.cs
index 80590d2..30a6079 100644
--- a/Assets/FlashTools/Scripts/FTRuntime/SwfSettings.cs
+++ b/Assets/FlashTools/Scripts/FTRuntime/SwfSettings.cs
@@ -1,4 +1,5 @@
 using UnityEngine;
+using FTRuntime.Internal;
 
 namespace FTRuntime {
 	[System.Serializable]