diff --git a/Makefile b/Makefile
index 32b2e92..003ccb9 100644
--- a/Makefile
+++ b/Makefile
@@ -2,7 +2,7 @@
 # $Id$
 #
 
-VERSION?=5.3
+VERSION?=5.4
 TAGVERSION=$(shell echo $(VERSION) | sed 's/\./_/g')
 BALL_TAR_GZ=UMLGraph-$(VERSION).tar.gz
 ZIPBALL=UMLGraph-$(VERSION).zip
diff --git a/doc/ack.xml b/doc/ack.xml
index 74adb49..697d490 100644
--- a/doc/ack.xml
+++ b/doc/ack.xml
@@ -37,10 +37,12 @@ UMLGraph would not be in its current state without their contributions.
 <li>Joshua Lim</li>
 <li>Vadim Nasardinov</li>
 <li>Laird Nelson</li>
+<li>Bernd Onasch</li>
 <li>S&#233;bastien Pierre</li>
 <li>Olek Poplavskyy</li>
 <li>Alessandro Riva</li>
 <li>Arnaud Rogues</li>
+<li>Soraya Santana de la Fe</li>
 <li>Jonathan R. Santos</li>
 <li>Jan Schl&#252;ter</li>
 <li>Sebastian Setzer</li>
@@ -50,5 +52,6 @@ UMLGraph would not be in its current state without their contributions.
 <li>Ivan F. Villanueva B.</li>
 <li>Przemyslaw Wesolek</li>
 <li>Franz Wilhelmstoetter</li>
+<li>Zhigang Xie</li>
 </ul>
 </notes>
diff --git a/doc/ver.xml b/doc/ver.xml
index d735a92..34a5630 100644
--- a/doc/ver.xml
+++ b/doc/ver.xml
@@ -3,7 +3,11 @@
 <notes>
 <dl>
 
-<dt>Version 5.4 Under development </dt><dd>
+<dt>Version 5.5 Under development </dt><dd>
+<ul>
+</ul>
+
+<dt>Version 5.4 2011-01-08</dt><dd>
 <ul>
 <li>Make the generation of diamond shapes compatible with GraphViz 2.27.
 (Contributed by Soraya Santana de la Fe.)</li>