diff --git a/doc/knode/commands.docbook b/doc/knode/commands.docbook
index 47a96ffe..6008dda4 100644
--- a/doc/knode/commands.docbook
+++ b/doc/knode/commands.docbook
@@ -1,5 +1,5 @@
 <!-- <?xml version="1.0" ?>
-<!DOCTYPE chapter PUBLIC "-//KDE//DTD DocBook XML V4.1-Based Variant V1.0//EN" "dtd/kdex.dtd">	-->
+<!DOCTYPE chapter PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN" "dtd/kdex.dtd">	-->
 
 <chapter id="commands">
 <title>Command reference</title>
diff --git a/doc/knode/faq.docbook b/doc/knode/faq.docbook
index d9b97d4f..d847ab25 100644
--- a/doc/knode/faq.docbook
+++ b/doc/knode/faq.docbook
@@ -1,5 +1,5 @@
 <!-- <?xml version="1.0" ?> 
-<!DOCTYPE chapter PUBLIC "-//KDE//DTD DocBook XML V4.1-Based Variant V1.0//EN" "dtd/kdex.dtd">
+<!DOCTYPE chapter PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN" "dtd/kdex.dtd">
 -->
 <chapter id="faq">
 <title>Questions and Answers</title>
diff --git a/doc/knode/introduction.docbook b/doc/knode/introduction.docbook
index a86de466..db14ec3a 100644
--- a/doc/knode/introduction.docbook
+++ b/doc/knode/introduction.docbook
@@ -1,5 +1,5 @@
 <!-- <?xml version="1.0" ?> 
-<!DOCTYPE chapter PUBLIC "-//KDE//DTD DocBook XML V4.1-Based Variant V1.0//EN" "dtd/kdex.dtd"> -->
+<!DOCTYPE chapter PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN" "dtd/kdex.dtd"> -->
 <chapter id="introduction"> 
 <title> Introduction</title> 
 <anchor id="anc-introduction"/> 
diff --git a/doc/knode/journey.docbook b/doc/knode/journey.docbook
index 30448513..54dc82a3 100644
--- a/doc/knode/journey.docbook
+++ b/doc/knode/journey.docbook
@@ -1,5 +1,5 @@
 <!-- <?xml version="1.0" ?>
-<!DOCTYPE chapter PUBLIC "-//KDE//DTD DocBook XML V4.1-Based Variant V1.0//EN" "dtd/kdex.dtd"> -->
+<!DOCTYPE chapter PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN" "dtd/kdex.dtd"> -->
 
 <chapter id="knode-journey"> 
 <title>A journey in the World of Newsgroups</title> 
diff --git a/doc/knode/more.docbook b/doc/knode/more.docbook
index 79bab826..ed3e58a2 100644
--- a/doc/knode/more.docbook
+++ b/doc/knode/more.docbook
@@ -1,5 +1,5 @@
 <!-- <?xml version="1.0" ?>
-<!DOCTYPE chapter PUBLIC "-//KDE//DTD DocBook XML V4.1-Based Variant V1.0//EN" "dtd/kdex.dtd"> -->
+<!DOCTYPE chapter PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN" "dtd/kdex.dtd"> -->
 	
 <chapter id="knode-more-info"> 
 <title> 
diff --git a/doc/knode/using-firststart.docbook b/doc/knode/using-firststart.docbook
index 945b26fd..242b2c67 100644
--- a/doc/knode/using-firststart.docbook
+++ b/doc/knode/using-firststart.docbook
@@ -1,5 +1,5 @@
 <!-- <?xml version="1.0" ?>
-<!DOCTYPE sect1 PUBLIC "-//KDE//DTD DocBook XML V4.1-Based Variant V1.0//EN"
+<!DOCTYPE sect1 PUBLIC "-//KDE//DTD DocBook XML V4.2-Based Variant V1.1//EN"
 "dtd/kdex.dtd"> -->
 <sect1 id="first-start">
 <title>The first start</title>
diff --git a/doc/konsolekalendar/index.docbook b/doc/konsolekalendar/index.docbook
index a20664c3..6e35c490 100644
--- a/doc/konsolekalendar/index.docbook
+++ b/doc/konsolekalendar/index.docbook
@@ -3,7 +3,7 @@
      + Change license to GPL+QT exception
      + Search for other TODOs
      END TODO -->
-<!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 konsolekalendar "<application>KonsoleKalendar</application>">