Update copyright header.

1 files changed, 1 insertions, 1 deletions

diff --git a/pict.scm b/pict.scm
index abf3705..23828eb 100644
--- a/pict.scm
+++ b/pict.scm
@@ -1,6 +1,6 @@
 ;;; pict.scm --- A simple picture language for Guile
 
-;;; Copyright © 2018, 2019 Ricardo Wurmus <rekado@elephly.net>
+;;; Copyright © 2018, 2019, 2020, 2021 Ricardo Wurmus <rekado@elephly.net>
 ;;;
 ;;; This library is free software; you can redistribute it and/or
 ;;; modify it under the terms of the GNU Lesser General Public License