COPYRIGHT

--- a/COPYRIGHT	Mon Dec 31 13:16:51 2012 +0100
+++ b/COPYRIGHT	Mon Dec 31 13:20:23 2012 +0100
@@ -1,6 +1,6 @@
 ISABELLE COPYRIGHT NOTICE, LICENCE AND DISCLAIMER.
 
-Copyright (c) 2012,
+Copyright (c) 1986-2013,
   University of Cambridge,
   Technische Universitaet Muenchen,
   and contributors.