diff --git a/README.md b/README.md
index fda331e..2cd6bc9 100644
--- a/README.md
+++ b/README.md
@@ -4,3 +4,5 @@ opensondage_ynh
 OpenSondage for YunoHost
 
 OpenSondage is used to poll people invite for a meeting.
+
+It's a custom version between https://github.com/framasoft/OpenSondage and https://github.com/leblanc-simon/OpenSondage . Indeed, the version from framasoft contains legal mention about framasoft, but is more advanced.