diff --git a/src/plugins/publish-calendar/publish-calendar.ui b/src/plugins/publish-calendar/publish-calendar.ui
index cb36135d6f..411ebe4f91 100644
--- a/src/plugins/publish-calendar/publish-calendar.ui
+++ b/src/plugins/publish-calendar/publish-calendar.ui
@@ -93,6 +93,10 @@
     <property name="visible">True</property>
     <property name="can_focus">True</property>
     <property name="border_width">6</property>
+    <property name="halign">fill</property>
+    <property name="hexpand">True</property>
+    <property name="valign">fill</property>
+    <property name="vexpand">True</property>
     <child>
       <object class="GtkVBox" id="vbox7">
         <property name="visible">True</property>