diff --git a/.config/i3/killScript.sh b/.config/i3/killScript.sh
index 46cabf0..39ff598 100755
--- a/.config/i3/killScript.sh
+++ b/.config/i3/killScript.sh
@@ -1,5 +1,8 @@
 #!/usr/bin/env bash
 # based on https://github.com/pastapojken/i3SteamOrKill
+# required packages: 
+# - xdotool
+
 winID=$(xdotool getactivewindow)
 winClass=$(xprop -id $winID WM_CLASS)