diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 16f3d800..00dcc3ec 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -4,3 +4,4 @@ Major contributurs to pyXMLSecurity
 Leif Johansson <leifj@sunet.se>
 Ivan Kanakarakis <ivan.kanak@gmail.com>
 Steffen Klemer <klemer@dfn.de>
+Fredrik Thulin <fredrik@thulin.net>