diff --git a/README.md b/README.md
index f34161c..24a536e 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,7 @@
-Z-Push For Yunohost
+# Z-Push For Yunohost
 ==========
 
 Z-push for Yunohost support IMAP sync and Carddav/Caldav sync if Baikal is installed
+Ability to send calendar invitations
+
+The sources are based on https://github.com/fmbiete/Z-Push-contrib