diff --git a/flake.nix b/flake.nix
index 3f3dd50..6dd6af1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -72,7 +72,7 @@
                 enable = mkEnableOption "gnome-autounlock.keyring";
 
                 target = mkOption {
-                  type = str;
+                  type = types.str;
                   default = "graphical-session.target";
                   example = "hyprland-session.target";
                 };