diff --git a/src/client/conversation-viewer/conversation-list-box.vala b/src/client/conversation-viewer/conversation-list-box.vala
index ac15cafa..dc90c683 100644
--- a/src/client/conversation-viewer/conversation-list-box.vala
+++ b/src/client/conversation-viewer/conversation-list-box.vala
@@ -761,6 +761,8 @@ public class ConversationListBox : Gtk.ListBox {
 
     private void show_loading() {
         Gtk.Spinner spinner = new Gtk.Spinner();
+        spinner.set_size_request(32, 32);
+        spinner.halign = spinner.valign = Gtk.Align.CENTER;
         spinner.start();
         spinner.show();
         set_placeholder(spinner);
diff --git a/ui/conversation-viewer.ui b/ui/conversation-viewer.ui
index 1c0ac635..2e870725 100644
--- a/ui/conversation-viewer.ui
+++ b/ui/conversation-viewer.ui
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!-- Generated with glade 3.20.0 -->
 <interface>
-  <requires lib="gtk+" version="3.10"/>
+  <requires lib="gtk+" version="3.14"/>
   <template class="ConversationViewer" parent="GtkStack">
     <property name="name">conversation_viewer</property>
     <property name="visible">True</property>
@@ -9,8 +9,12 @@
     <property name="transition_type">crossfade</property>
     <child>
       <object class="GtkSpinner" id="loading_page">
+        <property name="width_request">32</property>
+        <property name="height_request">32</property>
         <property name="visible">True</property>
         <property name="can_focus">False</property>
+        <property name="halign">center</property>
+        <property name="valign">center</property>
         <property name="active">True</property>
       </object>
       <packing>