diff --git a/ui/application-main-window.ui b/ui/application-main-window.ui
index 547b063f..c55e42ab 100644
--- a/ui/application-main-window.ui
+++ b/ui/application-main-window.ui
@@ -49,7 +49,7 @@
                             <property name="can_focus">False</property>
                             <property name="vexpand">True</property>
                             <property name="label_xalign">0</property>
-                            <property name="shadow_type">in</property>
+                            <property name="shadow_type">none</property>
                             <child>
                               <object class="GtkScrolledWindow" id="folder_list_scrolled">
                                 <property name="width_request">100</property>
@@ -95,7 +95,7 @@
                             <property name="visible">True</property>
                             <property name="can_focus">False</property>
                             <property name="label_xalign">0</property>
-                            <property name="shadow_type">in</property>
+                            <property name="shadow_type">none</property>
                             <child>
                               <object class="GtkScrolledWindow" id="conversation_list_scrolled">
                                 <property name="width_request">250</property>