diff --git a/doc/index.docbook b/doc/index.docbook
index 8d7f103..79d7af6 100644
--- a/doc/index.docbook
+++ b/doc/index.docbook
@@ -1,6 +1,6 @@
 <?xml version="1.0"?>
 
-<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN" "dtd/kdex.dtd" [
+<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.5-Based Variant V1.1//EN" "dtd/kdedbx45.dtd" [
 
         <!ENTITY partman "<application>KDE Partition Manager</application>"> <!--remove this entity later, it is also in lang/user.entities to make it translatable-->
 	<!ENTITY partman-introduction SYSTEM "introduction.docbook">