diff --git a/doc/index.docbook b/doc/index.docbook
index 35dc93ee6..0448825af 100644
--- a/doc/index.docbook
+++ b/doc/index.docbook
@@ -1,5 +1,5 @@
 <?xml version="1.0" ?>
-<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.1.2-Based Variant V1.1//EN"
+<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN"
  "dtd/kdex.dtd" [
   <!ENTITY kappname "&kdvi;">
   <!ENTITY package "kdegraphics">