diff --git a/CREDITS.txt b/CREDITS.txt
index 19cc3b980..07df1ae15 100644
--- a/CREDITS.txt
+++ b/CREDITS.txt
@@ -2137,3 +2137,6 @@ Hans-Reinhard Mette
 Alejandro Casals Oliver
 David Homewood
 John Dunning
+Konrad Helbach
+Bernard Delpy
+Raymond Ellsworth