diff --git a/App/UI/MainWindow.xml b/App/UI/MainWindow.xml
index 5f717fb..d2094e5 100644
--- a/App/UI/MainWindow.xml
+++ b/App/UI/MainWindow.xml
@@ -17,8 +17,15 @@
         <object class="AdwNavigationPage">
           <property name="title" translatable="yes">Sidebar</property>
           <property name="child">
-            <object class="GtkLabel">
-              <property name="label">I am a sidebar</property>
+            <object class="AdwToolbarView">
+              <child type="top">
+                <object class="AdwHeaderBar" />
+              </child>
+              <property name="content">
+                <object class="GtkLabel">
+                  <property name="label">I am a sidebar</property>
+                </object>
+              </property>
             </object>
           </property>
         </object>
@@ -27,8 +34,15 @@
         <object class="AdwNavigationPage">
           <property name="title" translatable="yes">Content</property>
           <property name="child">
-            <object class="GtkLabel">
-              <property name="label">Hello world</property>
+            <object class="AdwToolbarView">
+              <child type="top">
+                <object class="AdwHeaderBar" />
+              </child>
+              <property name="content">
+                <object class="GtkLabel">
+                  <property name="label">Hello world</property>
+                </object>
+              </property>
             </object>
           </property>
         </object>