diff --git a/COPYRIGHT b/COPYRIGHT
index 48ccf6c08..3f63650ba 100644
--- a/COPYRIGHT
+++ b/COPYRIGHT
@@ -1,6 +1,6 @@
 klayout is packaged by Peter C.S. Scholtens <peter.scholtens@xs4all.nl>
 and Matthias Köfferlein <matthias@koefferlein.de>
-and was obtained from https://www.klayout.org/downloads/source/klayout-0.27.tar.gz
+and was obtained from https://www.klayout.org/downloads/source/klayout-0.27.1.tar.gz
 
 Authors:
 	Matthias Köfferlein