diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index cebae2d..890e647 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -4,3 +4,4 @@ Thank you very much for your help and advices!
 - Merlijn Wajer (Wizzup)
 - Giovanni Rapagnani
 - Johny Mattsson
+- David Derby