diff --git a/garage.nix b/garage.nix
index ff2ec36..a8aa247 100644
--- a/garage.nix
+++ b/garage.nix
@@ -86,6 +86,7 @@ in {
             };
           };
         });
+        default = {};
       };
       ensureKeys = mkOption {
         type = types.attrsOf (types.submodule {
@@ -120,6 +121,7 @@ in {
             };
           };
         });
+        default = {};
       };
     };
   };