diff --git a/Wox/Helper/DWMDropShadow.cs b/Wox/Helper/DWMDropShadow.cs
index 30eba1aeeb..b50dff4b64 100644
--- a/Wox/Helper/DWMDropShadow.cs
+++ b/Wox/Helper/DWMDropShadow.cs
@@ -3,6 +3,7 @@ using System.Drawing.Printing;
 using System.Runtime.InteropServices;
 using System.Windows;
 using System.Windows.Interop;
+using System.Windows.Media;
 
 namespace Wox.Helper
 {
@@ -50,7 +51,9 @@ namespace Wox.Helper
                 WindowInteropHelper helper = new WindowInteropHelper(window);
                 int val = 2;
                 int ret1 = DwmSetWindowAttribute(helper.Handle, 2, ref val, 4);
-
+                window.Background = Brushes.Transparent;
+                HwndSource.FromHwnd(helper.Handle).CompositionTarget.BackgroundColor = Color.FromArgb(0, 0, 0, 0);  
+                
                 if (ret1 == 0)
                 {
                     Margins m = new Margins { Bottom = 0, Left = 0, Right = 0, Top = 0 };
diff --git a/Wox/MainWindow.xaml.cs b/Wox/MainWindow.xaml.cs
index e42174d99c..2b02ed8c94 100644
--- a/Wox/MainWindow.xaml.cs
+++ b/Wox/MainWindow.xaml.cs
@@ -90,7 +90,7 @@ namespace Wox
 
             InitProgressbarAnimation();
             //only works for win7+
-            //DwmDropShadow.DropShadowToWindow(this);
+            DwmDropShadow.DropShadowToWindow(this);
 
             WindowIntelopHelper.DisableControlBox(this);
         }