diff --git a/CREDITS.txt b/CREDITS.txt
index c5c876d29..a9970cb87 100644
--- a/CREDITS.txt
+++ b/CREDITS.txt
@@ -1491,3 +1491,5 @@ Steve Robbins
 Jean Noel Berlan
 Walter Szempruch
 Petr Kysela
+Gerhard Zdzuj
+Joseph S Robinson