diff --git a/README.md b/README.md
index 7ce9591..388b07a 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@ See also:
 # Prerequisites
 
 * [hastic-server](https://github.com/hastic/hastic-server)
-* [Grafana >= 5.4.0](https://grafana.com/grafana/download)
+* [Grafana >= 5.4.0](https://grafana.com/grafana/download), we don't support Grafana 6.x.x yet
 
 ## Support and Consulting