diff --git a/src/Views/Widgets/DiffViewer.xaml.cs b/src/Views/Widgets/DiffViewer.xaml.cs
index 739f49b3..c34cdeae 100644
--- a/src/Views/Widgets/DiffViewer.xaml.cs
+++ b/src/Views/Widgets/DiffViewer.xaml.cs
@@ -468,12 +468,13 @@ namespace SourceGit.Views.Widgets {
             line.SetBinding(TextBlock.ForegroundProperty, new Binding("FG"));
             line.SetBinding(TextBlock.FontStyleProperty, new Binding("Style"));
             line.SetValue(TextBlock.FontFamilyProperty, new FontFamily("Consolas,Microsoft YaHei UI"));
-            line.SetValue(TextBlock.FontSizeProperty, new FontSizeConverter().ConvertFrom("9pt"));
+            line.SetValue(TextBlock.FontSizeProperty, 13.0);
             line.SetValue(TextBlock.MarginProperty, new Thickness(0));
             line.SetValue(TextBlock.PaddingProperty, new Thickness(4, 0, 0, 0));
             line.SetValue(TextBlock.LineHeightProperty, 16.0);
             line.SetValue(TextOptions.TextFormattingModeProperty, TextFormattingMode.Display);
             line.SetValue(TextOptions.TextRenderingModeProperty, TextRenderingMode.ClearType);
+            line.SetValue(RenderOptions.ClearTypeHintProperty, ClearTypeHint.Enabled);
 
             var colContent = new DataGridTemplateColumn();
             colContent.CellTemplate = new DataTemplate();
diff --git a/src/Views/Widgets/Histories.xaml b/src/Views/Widgets/Histories.xaml
index 7307383f..1e465ca7 100644
--- a/src/Views/Widgets/Histories.xaml
+++ b/src/Views/Widgets/Histories.xaml
@@ -97,7 +97,7 @@
                                             </ItemsControl.ItemTemplate>
                                         </ItemsControl>
 
-                                        <TextBlock Text="{Binding Subject}" FontFamily="Consolas,Microsoft YaHei UI" FontSize="9pt" Margin="2,0,0,0"/>
+                                        <TextBlock Text="{Binding Subject}" FontFamily="Consolas,Microsoft YaHei UI Light" FontSize="13" RenderOptions.ClearTypeHint="Enabled" Margin="2,0,0,0"/>
                                     </StackPanel>
                                 </DataTemplate>
                             </DataGridTemplateColumn.CellTemplate>