diff --git a/README.md b/README.md
index 650c8ba..12b1494 100644
--- a/README.md
+++ b/README.md
@@ -87,4 +87,3 @@ Thanks to
 ---------
 
 - <http://www.smoke8.net/> for public designs of Einzahlungsscheinen
-- <http://www.developers-guide.net/forums/5431,modulo10-rekursiv> for Modulo10 function