diff --git a/ndn/gui.py b/ndn/gui.py
index 0fdc68b..cf090a4 100644
--- a/ndn/gui.py
+++ b/ndn/gui.py
@@ -1,8 +1,8 @@
 # -*- Mode:python; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
 #
-# Copyright (C) 2015 The University of Memphis,
-#                    Arizona Board of Regents,
-#                    Regents of the University of California.
+# Copyright (C) 2015-2016, The University of Memphis,
+#                          Arizona Board of Regents,
+#                          Regents of the University of California.
 #
 # This file is part of Mini-NDN.
 # See AUTHORS.md for a complete list of Mini-NDN authors and contributors.