diff --git a/Wino.Mail/Views/ComposePage.xaml b/Wino.Mail/Views/ComposePage.xaml
index 946515a8..9fb6ac6c 100644
--- a/Wino.Mail/Views/ComposePage.xaml
+++ b/Wino.Mail/Views/ComposePage.xaml
@@ -363,7 +363,10 @@
                         <toolkit:TabbedCommandBarItem Header="{x:Bind domain:Translator.EditorToolbarOption_Options}">
                             <AppBarElementContainer>
                                 <muxc:ToggleSplitButton x:Name="ImportanceSplitButton" IsChecked="{x:Bind ViewModel.IsImportanceSelected, Mode=TwoWay}">
-                                    <SymbolIcon x:Name="ImportanceSplitButtonContent" Symbol="Important" />
+                                    <FontIcon
+                                        FontFamily="Segoe Fluent Icons"
+                                        FontSize="16"
+                                        Glyph="&#xE8C9;" />
                                     <muxc:ToggleSplitButton.Flyout>
                                         <Flyout x:Name="ImportanceFlyout" Placement="Bottom">
                                             <StackPanel Orientation="Horizontal">
@@ -380,13 +383,13 @@
                                                     <Button.Tag>
                                                         <mailkit:MessageImportance>High</mailkit:MessageImportance>
                                                     </Button.Tag>
-                                                    <SymbolIcon Symbol="Important" />
+                                                    <FontIcon FontFamily="Segoe Fluent Icons" Glyph="&#xE8C9;" />
                                                 </Button>
                                                 <Button Click="ImportanceClicked">
                                                     <Button.Tag>
                                                         <mailkit:MessageImportance>Low</mailkit:MessageImportance>
                                                     </Button.Tag>
-                                                    <SymbolIcon Symbol="Download" />
+                                                    <FontIcon FontFamily="Segoe Fluent Icons" Glyph="&#xE8D0;" />
                                                 </Button>
                                             </StackPanel>
                                         </Flyout>
diff --git a/Wino.Mail/Views/ComposePage.xaml.cs b/Wino.Mail/Views/ComposePage.xaml.cs
index 352c519a..35926327 100644
--- a/Wino.Mail/Views/ComposePage.xaml.cs
+++ b/Wino.Mail/Views/ComposePage.xaml.cs
@@ -624,7 +624,7 @@ namespace Wino.Views
                 var selectedImportance = (MessageImportance)senderButton.Tag;
 
                 ViewModel.SelectedMessageImportance = selectedImportance;
-                (ImportanceSplitButton.Content as SymbolIcon).Symbol = (senderButton.Content as SymbolIcon).Symbol;
+                (ImportanceSplitButton.Content as FontIcon).Glyph = (senderButton.Content as FontIcon).Glyph;
             }
         }