diff --git a/Packages/MinimalUtility/Runtime/Debugging/DebugViewerBase.cs b/Packages/MinimalUtility/Runtime/Debugging/DebugViewerBase.cs
index 54fdf60..51068c9 100644
--- a/Packages/MinimalUtility/Runtime/Debugging/DebugViewerBase.cs
+++ b/Packages/MinimalUtility/Runtime/Debugging/DebugViewerBase.cs
@@ -30,7 +30,7 @@ public abstract class DebugViewerBase
         /// <returns>ルート要素.</returns>
         public virtual VisualElement Start()
         {
-            var uiDocument = DontDestroyObject.Default.AddComponent<UIDocument>();
+            var uiDocument = DontDestroyObject.Shared.AddComponent<UIDocument>();
             if (panelSettings == null)
             {
                 panelSettings = ScriptableObject.CreateInstance<PanelSettings>();