diff --git a/README.md b/README.md
index 23769c6cfa1c581264a4b17047c450f51cc17d21..53ef8805181465186ee45f15fbb90893b98e52cc 100644
--- a/README.md
+++ b/README.md
@@ -41,6 +41,7 @@ this repository contains the files needed to run the DG_PY_KALYPSO device. this
 ### Prerequisites
 
 You must have installed Tango and PyTango locally on the kalypso PC and have a valid tango environment (TANGO_DB,...).
+https://tango-controls.readthedocs.io/en/latest/installation/index.html
 * tango
 ``` sh
 sudo apt-get update