diff --git a/contributors.txt b/contributors.txt
index 6e1d2ffdd..a55a31707 100644
--- a/contributors.txt
+++ b/contributors.txt
@@ -181,3 +181,4 @@ YYYY/MM/DD, github id, Full name, email
 2017/12/20, kbsletten, Kyle Sletten, kbsletten@gmail.com
 2017/12/27, jkmar, Jakub Marciniszyn, marciniszyn.jk@gmail.com
 2018/02/11, io7m, Mark Raynsford, code@io7m.com
+2018/15/05, johnvanderholt, jan dillingh johnvanderholte@gmail.com