diff --git a/demo/Semi.Avalonia.Demo/Pages/ProgressBarDemo.axaml b/demo/Semi.Avalonia.Demo/Pages/ProgressBarDemo.axaml
index 6585870..f38bd00 100644
--- a/demo/Semi.Avalonia.Demo/Pages/ProgressBarDemo.axaml
+++ b/demo/Semi.Avalonia.Demo/Pages/ProgressBarDemo.axaml
@@ -25,6 +25,7 @@
                     Width="100"
                     Height="100"
                     IsIndeterminate="True"
+                    BorderThickness="16"
                     Maximum="{Binding #slider.Maximum}"
                     Minimum="{Binding #slider.Minimum}"
                     Theme="{DynamicResource ProgressRing}"
@@ -162,4 +163,4 @@
                 Value="60" />
         </StackPanel>
     </ScrollViewer>
-</UserControl>
\ No newline at end of file
+</UserControl>