diff --git a/copyright.txt b/copyright.txt
index 67fa7b616..fa384d69a 100644
--- a/copyright.txt
+++ b/copyright.txt
@@ -19,8 +19,9 @@ Pavel Makhov
 Remko Plantenga
 Samuel Wright
 Sebastian Hasait
-Sjaak Derksen
 Sean Huang
+Sjaak Derksen
+Stefan May
 Timo Eckhardt
 Tomek Gubala
 Vincent Alexander Beelte