diff --git a/README.md b/README.md
index c1ac7dd..809f393 100644
--- a/README.md
+++ b/README.md
@@ -20,8 +20,10 @@ For the script's regular execution add the following to the crontab:
 
 # Dependencies
 
-- Python Package [Networkx](https://networkx.github.io/)
+- Python 3
+- Python 3 Package [Networkx](https://networkx.github.io/)
 - [alfred-json](https://github.com/tcatm/alfred-json)
+- rrdtool (if run with `--with-rrd`)
 
 # Running as unprivileged user