diff --git a/chrome/content/zotero/update/update-header.js b/chrome/content/zotero/update/update-header.js
index 5c55d9275a..0082d32977 100644
--- a/chrome/content/zotero/update/update-header.js
+++ b/chrome/content/zotero/update/update-header.js
@@ -5,7 +5,7 @@
 "use strict";
 
 {
-	Services.scriptloader.loadSubScript("chrome://zotero/content/elements/base.js", this);
+	Services.scriptloader.loadSubScript("chrome://zotero/content/customElements.js", this);
 	const XULElementBaseMixin = MozElements.MozElementMixin(XULElementBase);
 	
 	class UpdateHeader extends XULElementBaseMixin {
diff --git a/chrome/content/zotero/update/updates.xhtml b/chrome/content/zotero/update/updates.xhtml
index c8a0474df9..2f0e8a861c 100644
--- a/chrome/content/zotero/update/updates.xhtml
+++ b/chrome/content/zotero/update/updates.xhtml
@@ -5,6 +5,7 @@
    - file, You can obtain one at http://mozilla.org/MPL/2.0/. -->
 
 <?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
+<?xml-stylesheet href="chrome://zotero-platform/content/zotero.css" type="text/css"?>
 <?xml-stylesheet href="chrome://zotero/content/update/updates.css"?>
 
 <!DOCTYPE wizard [
@@ -22,15 +23,13 @@
         style="width: auto; height: auto"
         onload="gUpdates.onLoad();"
         onunload="gUpdates.onUnload();">
-
-<script src="chrome://global/content/customElements.js"/>
 <script src="chrome://global/content/contentAreaUtils.js"/>
 <script src="chrome://global/content/globalOverlay.js"/>
 <script src="chrome://zotero/content/editMenuOverlay.js"/>
 <script src="chrome://zotero/content/update/updates.js"/>
 <script src="chrome://zotero/content/update/update-header.js"/>
 
-<wizard>
+<wizard width="500" height="400">
   <linkset>
     <html:link rel="localization" href="toolkit/global/wizard.ftl"/>
   </linkset>