diff --git a/CONTRIBUTORS.txt b/CONTRIBUTORS.txt
index 143b2b78..d57b6015 100644
--- a/CONTRIBUTORS.txt
+++ b/CONTRIBUTORS.txt
@@ -200,3 +200,6 @@
 
 - Matěj Týč
   Extended the image labelling implementation so it also works on 3D images.
+
+- Salvatore Scaramuzzino
+  RectTool example
\ No newline at end of file