diff --git a/plugins/pager/pager-dialog.glade b/plugins/pager/pager-dialog.glade
index 02fbcdeea91e79e0e38390b06a4fdfb9d3bf4f33..cd5cdf3226e9c794fb4c79eae2885817b34aac68 100644
--- a/plugins/pager/pager-dialog.glade
+++ b/plugins/pager/pager-dialog.glade
@@ -1,20 +1,19 @@
 <?xml version="1.0"?>
 <interface>
-  <requires lib="gtk+" version="2.24"/>
-  <!-- interface-requires libxfce4ui 0.0 -->
-  <!-- interface-naming-policy toplevel-contextual -->
+  <requires lib="gtk+" version="3.20"/>
+  <requires lib="libxfce4ui-2" version="4.12"/>
   <object class="XfceTitledDialog" id="dialog">
     <property name="title" translatable="yes">Workspace Switcher</property>
     <property name="icon_name">gtk-properties</property>
     <property name="type_hint">normal</property>
     <property name="has_separator">False</property>
     <child internal-child="vbox">
-      <object class="GtkVBox" id="dialog-vbox2">
+      <object class="GtkBox" id="dialog-vbox2">
         <property name="visible">True</property>
         <property name="orientation">vertical</property>
         <property name="spacing">2</property>
         <child>
-          <object class="GtkVBox" id="vbox2">
+          <object class="GtkBox" id="vbox2">
             <property name="visible">True</property>
             <property name="border_width">6</property>
             <property name="orientation">vertical</property>
@@ -29,13 +28,13 @@
                     <property name="visible">True</property>
                     <property name="left_padding">12</property>
                     <child>
-                      <object class="GtkVBox" id="vbox4">
+                      <object class="GtkBox" id="vbox4">
                         <property name="visible">True</property>
                         <property name="border_width">6</property>
                         <property name="orientation">vertical</property>
                         <property name="spacing">6</property>
                         <child>
-                          <object class="GtkHBox" id="hbox3">
+                          <object class="GtkBox" id="hbox3">
                             <property name="visible">True</property>
                             <property name="spacing">12</property>
                             <child>
@@ -167,7 +166,7 @@
           </packing>
         </child>
         <child internal-child="action_area">
-          <object class="GtkHButtonBox" id="dialog-action_area2">
+          <object class="GtkButtonBox" id="dialog-action_area2">
             <property name="visible">True</property>
             <property name="layout_style">end</property>
             <child>