diff --git a/pkgs/servers/home-assistant/frontend.nix b/pkgs/servers/home-assistant/frontend.nix
index 0a5e3d328b73..fd873011488a 100644
--- a/pkgs/servers/home-assistant/frontend.nix
+++ b/pkgs/servers/home-assistant/frontend.nix
@@ -1,6 +1,8 @@
 { lib, fetchPypi, buildPythonPackage }:
 
 buildPythonPackage rec {
+  # the frontend version corresponding to a specific home-assistant version can be found here
+  # https://github.com/home-assistant/home-assistant/blob/master/homeassistant/components/frontend/manifest.json
   pname = "home-assistant-frontend";
   version = "20190919.0";