diff --git a/src/Semi.Avalonia/Controls/TimePicker.axaml b/src/Semi.Avalonia/Controls/TimePicker.axaml
index 80defe1..561b617 100644
--- a/src/Semi.Avalonia/Controls/TimePicker.axaml
+++ b/src/Semi.Avalonia/Controls/TimePicker.axaml
@@ -157,7 +157,7 @@
         <Setter Property="Foreground" Value="{DynamicResource DateTimePickerButtonForeground}" />
         <Setter Property="Background" Value="{DynamicResource DateTimePickerButtonBackground}" />
         <Setter Property="BorderBrush" Value="{DynamicResource DateTimePickerButtonBorderBrush}" />
-        <Setter Property="BorderThickness" Value="1" />
+        <Setter Property="BorderThickness" Value="{DynamicResource DateTimePickerButtonBorderThickness}" />
         <Setter Property="CornerRadius" Value="3" />
         <Setter Property="HorizontalAlignment" Value="Left" />
         <Setter Property="VerticalAlignment" Value="Center" />