diff --git a/src/AboutDialog.html b/src/AboutDialog.html
index d079c233..632385aa 100644
--- a/src/AboutDialog.html
+++ b/src/AboutDialog.html
@@ -39,7 +39,7 @@
 </p>
 
 <p>
-Copyright (C) 2009-2015 The OpenSCAD Developers
+Copyright (C) 2009-2017 The OpenSCAD Developers
 </p>
 
 <p>
diff --git a/src/mainwin.cc b/src/mainwin.cc
index 46f7d456..1d96c559 100644
--- a/src/mainwin.cc
+++ b/src/mainwin.cc
@@ -134,7 +134,7 @@
 unsigned int GuiLocker::gui_locked = 0;
 
 static char copyrighttext[] =
-	"Copyright (C) 2009-2015 The OpenSCAD Developers\n"
+	"Copyright (C) 2009-2017 The OpenSCAD Developers\n"
 	"\n"
 	"This program is free software; you can redistribute it and/or modify "
 	"it under the terms of the GNU General Public License as published by "