diff --git a/demo/Ursa.Demo/App.axaml b/demo/Ursa.Demo/App.axaml
index 9ac19d2b..418891cc 100644
--- a/demo/Ursa.Demo/App.axaml
+++ b/demo/Ursa.Demo/App.axaml
@@ -1,7 +1,7 @@
 <Application
     x:Class="Ursa.Demo.App"
     xmlns="https://github.com/avaloniaui"
-    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
     xmlns:u-semi="https://irihi.tech/ursa/themes/semi"
     xmlns:semi="https://irihi.tech/semi">
     <Application.Styles>