diff --git a/CONTRIBUTORS.rst b/CONTRIBUTORS.rst
index 6331e1da..25f9606d 100644
--- a/CONTRIBUTORS.rst
+++ b/CONTRIBUTORS.rst
@@ -9,3 +9,4 @@ Credits
 * Paul Tremberth
 * Piotr Bulinski
 * David Baumgold
+* Horst Gutmann