diff --git a/xml2xslt.xsl b/xml2xslt.xsl
index a81bd47..aa98f8a 100755
--- a/xml2xslt.xsl
+++ b/xml2xslt.xsl
@@ -3,7 +3,7 @@
 	version="1.0"
 	xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
 	xmlns:xsl-out="[irrelevant]"
-	xmlns:exsl="http://xml.apache.org/xalan"
+	xmlns:exsl="http://exslt.org/common"
 >
 
 	<!-- OK, this is my first bash at an XSLT transformation for a master XML document defining how to transform elements in the course handbook source into HTML and LaTeX.  Hmm, meta-stylesheet?!  -->