diff --git a/hass/README.md b/hass/README.md
index 54e667c..6664306 100644
--- a/hass/README.md
+++ b/hass/README.md
@@ -21,3 +21,4 @@ $ curl http://localhost:8123
 ```
 
 > More python packages will be installed during startup.
+> The missing package can be installed: `pip install --target=data sqlalchemy==1.1.3`.