update CREDITS
diff --git a/CREDITS.TXT b/CREDITS.TXT
index 576034e..1491f0c 100644
--- a/CREDITS.TXT
+++ b/CREDITS.TXT
@@ -33,3 +33,4 @@
 Daniel Godas-Lopez
 Joshua J. Drake
 Edgar Barbosa
+Ralf-Philipp Weinmann