diff --git a/README.md b/README.md
index 452ec6d..25931e9 100644
--- a/README.md
+++ b/README.md
@@ -5,3 +5,6 @@
 * [K-Door-Web](kdoorweb) - Central door admin web interface
 * [K-Door-Pi](kdoorpi) - Door client that runs on Raspberry Pi and talks to the hardware.
 
+Maybe replaces current [upgrid] software
+
+[upgrid]: https://bitbucket.org/upgrid/doorlock/src/master/