diff --git a/demo/Ursa.Demo/Pages/MultiComboBoxDemo.axaml b/demo/Ursa.Demo/Pages/MultiComboBoxDemo.axaml
index c325754..c7b29c7 100644
--- a/demo/Ursa.Demo/Pages/MultiComboBoxDemo.axaml
+++ b/demo/Ursa.Demo/Pages/MultiComboBoxDemo.axaml
@@ -14,6 +14,7 @@
     <StackPanel Orientation="Horizontal">
         <u:MultiComboBox
             Watermark="Please Select"
+            Width="300"
             MaxHeight="200"
             SelectedItems="{Binding SelectedItems}"
             ItemsSource="{Binding Items}" >
@@ -21,6 +22,7 @@
         <u:MultiComboBox
             Name="combo"
             Watermark="Please Select"
+            Width="300"
             InnerLeftContent="Left"
             InnerRightContent="Right"
             Classes="ClearButton"
diff --git a/src/Ursa.Themes.Semi/Controls/MultiComboBox.axaml b/src/Ursa.Themes.Semi/Controls/MultiComboBox.axaml
index 9514d0e..d1576d7 100644
--- a/src/Ursa.Themes.Semi/Controls/MultiComboBox.axaml
+++ b/src/Ursa.Themes.Semi/Controls/MultiComboBox.axaml
@@ -10,7 +10,6 @@
         <Setter Property="CornerRadius" Value="{DynamicResource ComboBoxSelectorCornerRadius}" />
         <Setter Property="BorderBrush" Value="Transparent" />
         <Setter Property="HorizontalAlignment" Value="Left" />
-        <Setter Property="Width" Value="300" />
         <Setter Property="MaxDropdownHeight" Value="300" />
         <Setter Property="MaxSelectionBoxHeight" Value="270"></Setter>
         <Setter Property="MinHeight" Value="32" />