diff --git a/contributors.txt b/contributors.txt
index 421c45b..0891c56 100644
--- a/contributors.txt
+++ b/contributors.txt
@@ -1,4 +1,6 @@
+Paul Cassella
 Lydia Duncan
+Michael Ferguson
 Simon Andreas Frimann Lund (original developer)
 Elliot Ronaghan
 Thomas Van Doren