diff --git a/MdXaml/Markdown.Style.xaml b/MdXaml/Markdown.Style.xaml
index 2ef42d8..d196f78 100644
--- a/MdXaml/Markdown.Style.xaml
+++ b/MdXaml/Markdown.Style.xaml
@@ -471,7 +471,7 @@
         <Setter Property="FontFamily"    Value="Calibri" />
         <Setter Property="TextAlignment" Value="Left" />
         <Setter Property="PagePadding"   Value="0"/>
-        <Setter Property="FontSize"      Value="14"/>
+        <Setter Property="FontSize"      Value="{mde:FontSizeScale 1.1667, TargetType={x:Type mdx:MarkdownScrollViewer} }"/>
 
         <Style.Resources>
             <Style TargetType="Section">
diff --git a/MdXaml/MarkdownMigFree.Style.xaml b/MdXaml/MarkdownMigFree.Style.xaml
index 5ca157b..2df27bf 100644
--- a/MdXaml/MarkdownMigFree.Style.xaml
+++ b/MdXaml/MarkdownMigFree.Style.xaml
@@ -380,7 +380,7 @@
         <Setter Property="FontFamily"    Value="Calibri" />
         <Setter Property="TextAlignment" Value="Left" />
         <Setter Property="PagePadding"   Value="0"/>
-        <Setter Property="FontSize"      Value="14"/>
+        <Setter Property="FontSize"      Value="{mde:FontSizeScale 1.1667, TargetType={x:Type mdx:MarkdownScrollViewer} }"/>
 
         <Style.Resources>
             <Style TargetType="Section">