diff --git a/doc/cs/index.docbook b/doc/cs/index.docbook
index ddf790c..941f9e1 100755
--- a/doc/cs/index.docbook
+++ b/doc/cs/index.docbook
@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="UTF8" ?>
-<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.1-Based Variant V1.0//EN" 
-"dtd/kdex.dtd" [
+<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN" "dtd/kdex.dtd" [
   <!ENTITY knutclient '<application>KNutClient</application>'>
   <!ENTITY kappname "&knutclient;"><!-- replace knutclient here -->
   <!ENTITY % addindex "IGNORE">
diff --git a/doc/en/index.docbook b/doc/en/index.docbook
index 7e2018f..730e0ef 100755
--- a/doc/en/index.docbook
+++ b/doc/en/index.docbook
@@ -1,6 +1,5 @@
 <?xml version="1.0" ?>
-<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.1-Based Variant V1.0//EN"
-"dtd/kdex.dtd" [
+<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN" "dtd/kdex.dtd" [
   <!ENTITY knutclient '<application>KNutClient</application>'>
   <!ENTITY kappname "&knutclient;"><!-- replace knutclient here -->
   <!ENTITY % addindex "IGNORE">