diff --git a/i3.nix b/i3.nix
index e027d4e..5e015cd 100644
--- a/i3.nix
+++ b/i3.nix
@@ -18,6 +18,7 @@
     arandr
     xautolock i3lock
     xdotool
+    xlibs.xbacklight
   ] ++ gnome3.corePackages;
 
   environment.gnome3.packageSet = pkgs.gnome3_16;