diff --git a/apps/hyprpaper/default.nix b/apps/hyprpaper/default.nix
index 7cad7f6..d0c92ad 100644
--- a/apps/hyprpaper/default.nix
+++ b/apps/hyprpaper/default.nix
@@ -52,7 +52,7 @@
     ${pkgs.hyprland}/bin/hyprctl hyprpaper preload "$CACHE_FILE"
     ${pkgs.hyprland}/bin/hyprctl hyprpaper wallpaper ",$CACHE_FILE"
 
-    exec matugen image "$CACHE_FILE"
+    exec matugen image "$CACHE_FILE" --source-color-index 0
   '';
 in {
   wayland.windowManager.hyprland.settings = {