diff --git a/st-training-guides.xml b/st-training-guides.xml
index 5485b887..7801e887 100644
--- a/st-training-guides.xml
+++ b/st-training-guides.xml
@@ -2,8 +2,6 @@
 <set xmlns="http://docbook.org/ns/docbook"
     xmlns:xlink="http://www.w3.org/1999/xlink"
     xmlns:xi="http://www.w3.org/2001/XInclude"
-    xmlns:svg="http://www.w3.org/2000/svg"
-    xmlns:html="http://www.w3.org/1999/xhtml"
     version="5.0"
     xml:id="st-training-guides">
     <title>OpenStack Training Guides</title>