diff --git a/lib/fudo/grafana.nix b/lib/fudo/grafana.nix
index 7aaa45d..aa88f83 100644
--- a/lib/fudo/grafana.nix
+++ b/lib/fudo/grafana.nix
@@ -11,7 +11,7 @@ let
 
 in {
 
-  options.fudo.grafana = {
+  options.fudo.grafana = with types; {
     enable = mkEnableOption "Fudo Metrics Display Service";
 
     hostname = mkOption {