diff --git a/lib/widgets/drag_target_grid.dart b/lib/widgets/drag_target_grid.dart
index 35f1fd7..5db6085 100644
--- a/lib/widgets/drag_target_grid.dart
+++ b/lib/widgets/drag_target_grid.dart
@@ -52,6 +52,7 @@ class DragTargetGridState extends State<DragTargetGrid> {
 
   @override
   void didUpdateWidget(DragTargetGrid oldWidget) {
+    _list = [...widget.list];
     _orgList = [...widget.orgList];
     super.didUpdateWidget(oldWidget);
   }