diff --git a/modules/helm.nix b/modules/helm.nix
index 682d9d7..0e51a81 100644
--- a/modules/helm.nix
+++ b/modules/helm.nix
@@ -88,6 +88,7 @@ in {
           inherit (config) chart name namespace values kubeVersion;
         });
       }));
+      default = {};
     };
   };