diff --git a/modules/services/emacs.nix b/modules/services/emacs.nix
index f6716ad..92a2782 100644
--- a/modules/services/emacs.nix
+++ b/modules/services/emacs.nix
@@ -24,7 +24,7 @@ in
       };
 
       exec = mkOption {
-        type = types.string;
+        type = types.str;
         default = "emacs";
         description = "Emacs command/binary to execute.";
       };
diff --git a/modules/users/group.nix b/modules/users/group.nix
index 5aea718..1dc26f1 100644
--- a/modules/users/group.nix
+++ b/modules/users/group.nix
@@ -21,7 +21,7 @@ with lib;
     };
 
     members = mkOption {
-      type = types.listOf types.string;
+      type = types.listOf types.str;
       default = [];
       description = "The group's members.";
     };