diff --git a/src/Samples/Toolkit.SampleApp.UWP/Samples/PopupViewer/PopupViewerSample.xaml b/src/Samples/Toolkit.SampleApp.UWP/Samples/PopupViewer/PopupViewerSample.xaml
index 2d7cc8874..a9177d725 100644
--- a/src/Samples/Toolkit.SampleApp.UWP/Samples/PopupViewer/PopupViewerSample.xaml
+++ b/src/Samples/Toolkit.SampleApp.UWP/Samples/PopupViewer/PopupViewerSample.xaml
@@ -4,10 +4,9 @@
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-      xmlns:esri="using:Esri.ArcGISRuntime.UI.Controls"
-      xmlns:toolkit="using:Esri.ArcGISRuntime.Toolkit.UI.Controls"
-    mc:Ignorable="d"
-    RequestedTheme="Light">
+    xmlns:esri="using:Esri.ArcGISRuntime.UI.Controls"
+    xmlns:toolkit="using:Esri.ArcGISRuntime.Toolkit.UI.Controls"
+    mc:Ignorable="d">
 
     <Grid Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">
         <Grid.ColumnDefinitions>