diff --git a/data/tools/unit_tree/html_output.py b/data/tools/unit_tree/html_output.py
index 22d6717e9be..6397272bdcd 100644
--- a/data/tools/unit_tree/html_output.py
+++ b/data/tools/unit_tree/html_output.py
@@ -34,7 +34,7 @@ html_footer = '''
 <div id="footer">
 <p>%(generation_note)s</p>
 <p><a href="http://wiki.wesnoth.org/Site_Map">Site map</a></p>
-<p><a href="http://www.wesnoth.org/wiki/Wesnoth:Copyrights">Copyright</a> &copy; 2003-2013 The Battle for Wesnoth</p>
+<p><a href="http://www.wesnoth.org/wiki/Wesnoth:Copyrights">Copyright</a> &copy; 2003-2014 The Battle for Wesnoth</p>
 <p>Supported by <a href="http://www.jexiste.fr/">Jexiste</a></p>
 </div>
 </div>