diff --git a/doc/guide/release/copyright.sdf b/doc/guide/release/copyright.sdf
index a8940b3808966c5e16503700056cbbf5688fb59d..1662d8d62b1629f979483f10b43652c6843c0f39 100644
--- a/doc/guide/release/copyright.sdf
+++ b/doc/guide/release/copyright.sdf
@@ -58,8 +58,8 @@ Public License}}.
 Portions [[copyright]] 1999-2007 Howard Y.H. Chu.
 Portions [[copyright]] 1999-2007 Symas Corporation.
 Portions [[copyright]] 1998-2003 Hallvard B. Furuseth.
-Portions [[copyright]] 2007-2009 Gavin Henry.
-Portions [[copyright]] 2007-2009 Suretec Systems Limited.
+Portions [[copyright]] 2007-2011 Gavin Henry.
+Portions [[copyright]] 2007-2011 Suretec Systems Limited.
 {{All rights reserved.}}
 !endblock