diff --git a/Bin/net40/SunnyUI.Demo.exe b/Bin/net40/SunnyUI.Demo.exe
index 783ddb8e..ab85fc9a 100644
Binary files a/Bin/net40/SunnyUI.Demo.exe and b/Bin/net40/SunnyUI.Demo.exe differ
diff --git a/Bin/net40/SunnyUI.dll b/Bin/net40/SunnyUI.dll
index 78e3ee6d..e399c522 100644
Binary files a/Bin/net40/SunnyUI.dll and b/Bin/net40/SunnyUI.dll differ
diff --git a/SunnyUI/Controls/DropItem/UIDropControl.Designer.cs b/SunnyUI/Controls/DropItem/UIDropControl.Designer.cs
index 60d08607..fcd75ee6 100644
--- a/SunnyUI/Controls/DropItem/UIDropControl.Designer.cs
+++ b/SunnyUI/Controls/DropItem/UIDropControl.Designer.cs
@@ -17,6 +17,8 @@
             {
                 components.Dispose();
             }
+
+            ItemForm?.Dispose();
             base.Dispose(disposing);
         }