diff --git a/Wox/Helper/DWMDropShadow.cs b/Wox/Helper/DWMDropShadow.cs
index b50dff4b64..60253f8c06 100644
--- a/Wox/Helper/DWMDropShadow.cs
+++ b/Wox/Helper/DWMDropShadow.cs
@@ -50,10 +50,8 @@ 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);  
-                
+                int ret1 = DwmSetWindowAttribute(helper.Handle, 2, ref val, 4);  
+
                 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 245968619f..3c47eb06e6 100644
--- a/Wox/MainWindow.xaml.cs
+++ b/Wox/MainWindow.xaml.cs
@@ -8,6 +8,7 @@ using System.Windows;
 using System.Windows.Controls;
 using System.Windows.Forms;
 using System.Windows.Input;
+using System.Windows.Interop;
 using System.Windows.Media;
 using System.Windows.Media.Animation;
 using WindowsInput;
@@ -97,6 +98,9 @@ namespace Wox
             if (UserSettingStorage.Instance.OpacityMode == OpacityMode.DWM)
                 DwmDropShadow.DropShadowToWindow(this);
 
+            this.Background = Brushes.Transparent;
+            HwndSource.FromHwnd(new WindowInteropHelper(this).Handle).CompositionTarget.BackgroundColor = Color.FromArgb(0, 0, 0, 0);  
+
             WindowIntelopHelper.DisableControlBox(this);
         }
 
diff --git a/Wox/Themes/Aero Dark.xaml b/Wox/Themes/Aero Dark.xaml
index 5350d2fce4..7d83892a10 100644
--- a/Wox/Themes/Aero Dark.xaml	
+++ b/Wox/Themes/Aero Dark.xaml	
@@ -16,7 +16,7 @@
 		</Style.Resources>
 	</Style>
 	<Style x:Key="WindowBorderStyle" BasedOn="{StaticResource BaseWindowBorderStyle}" TargetType="{x:Type Border}">
-		<Setter Property="Background" Value="#00000000"></Setter>
+		<Setter Property="Background" Value="#01ffffff"></Setter>
 	</Style>
 	<Style x:Key="WindowStyle" TargetType="{x:Type Window}" BasedOn="{StaticResource BaseWindowStyle}" >
 	</Style>
diff --git a/Wox/Themes/Aero Light.xaml b/Wox/Themes/Aero Light.xaml
index 73d7c0c3b5..d659259003 100644
--- a/Wox/Themes/Aero Light.xaml	
+++ b/Wox/Themes/Aero Light.xaml	
@@ -16,7 +16,7 @@
 		</Style.Resources>
 	</Style>
 	<Style x:Key="WindowBorderStyle" BasedOn="{StaticResource BaseWindowBorderStyle}" TargetType="{x:Type Border}">
-		<Setter Property="Background" Value="#00000000"></Setter>
+		<Setter Property="Background" Value="#01000000"></Setter>
 	</Style>
 	<Style x:Key="WindowStyle" TargetType="{x:Type Window}" BasedOn="{StaticResource BaseWindowStyle}" >
 	</Style>