diff --git a/doc/en/index.docbook b/doc/en/index.docbook
index 4657fdb..79947ec 100644
--- a/doc/en/index.docbook
+++ b/doc/en/index.docbook
@@ -1,5 +1,5 @@
 <?xml version="1.0" ?>
-<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.1.2-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 rosegarden "<application>Rosegarden</application>">
   <!ENTITY MIDI "<acronym>MIDI</acronym>">
   <!ENTITY % English "INCLUDE" > <!-- change language only here -->
diff --git a/doc/es/index.docbook b/doc/es/index.docbook
index 4ffbfd3..f8ca463 100644
--- a/doc/es/index.docbook
+++ b/doc/es/index.docbook
@@ -1,5 +1,5 @@
 <?xml version="1.0" ?>
-<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.1.2-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 rosegarden "<application
 >Rosegarden</application
 >">
diff --git a/doc/ja/index.docbook b/doc/ja/index.docbook
index 964e461..dff9246 100644
--- a/doc/ja/index.docbook
+++ b/doc/ja/index.docbook
@@ -1,5 +1,5 @@
 <?xml version="1.0" ?>
-<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.1.2-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 rosegarden "<application>Rosegarden</application>">
   <!ENTITY MIDI "<acronym>MIDI</acronym>">
   <!ENTITY % English "INCLUDE" > <!-- change language only here -->
diff --git a/doc/sv/index.docbook b/doc/sv/index.docbook
index 7fa1da7..d06dd26 100644
--- a/doc/sv/index.docbook
+++ b/doc/sv/index.docbook
@@ -1,5 +1,5 @@
 <?xml version="1.0" ?>
-<!DOCTYPE book PUBLIC "-//KDE//DTD DocBook XML V4.1.2-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 rosegarden "<application
 >Rosegarden</application
 >">