diff --git a/TuneUp/TuneUpWindow.xaml b/TuneUp/TuneUpWindow.xaml
index 662c37d..74fd3f8 100644
--- a/TuneUp/TuneUpWindow.xaml
+++ b/TuneUp/TuneUpWindow.xaml
@@ -41,6 +41,7 @@
             <!--  DataGrid style  -->
             <Style x:Key="DataGridStyleTuneUpCombined" TargetType="{x:Type DataGrid}">
                 <Setter Property="AutoGenerateColumns" Value="False" />
+                <Setter Property="IsReadOnly" Value="True" />
                 <Setter Property="CanUserAddRows" Value="False" />
                 <Setter Property="CanUserResizeColumns" Value="False" />
                 <Setter Property="CanUserSortColumns" Value="True" />