diff --git a/src/Ursa.Themes.Semi/Controls/MessageBoxWindow.axaml b/src/Ursa.Themes.Semi/Controls/MessageBoxWindow.axaml
index fd00509..a3defb5 100644
--- a/src/Ursa.Themes.Semi/Controls/MessageBoxWindow.axaml
+++ b/src/Ursa.Themes.Semi/Controls/MessageBoxWindow.axaml
@@ -80,25 +80,25 @@
HorizontalAlignment="Right"
Orientation="Horizontal">
+ Classes="Tertiary"
+ Content="Cancel" />
+
-