diff --git a/traceur.xsl b/traceur.xsl
index 0083996..1472c86 100644
--- a/traceur.xsl
+++ b/traceur.xsl
@@ -1,4 +1,4 @@
-<xsl:transform version="3.0"
+<xsl:transform version="2.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:math="http://www.w3.org/2005/xpath-functions/math"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"