diff --git a/sway/.config/sway/config b/sway/.config/sway/config
index 92bb94e..f78fc95 100644
--- a/sway/.config/sway/config
+++ b/sway/.config/sway/config
@@ -296,6 +296,11 @@ set $lock_bg ~/Photos/Wallpapers/wallhaven-638719.png
 exec swayidle -w \
          before-sleep 'swaylock -f -c 000000 -i $lock_bg'
 
+# disable external monitor when lid is closed
+set $monitor HDMI-A-2
+bindswitch --reload --locked lid:on output $monitor disable
+bindswitch --reload --locked lid:off output $monitor enable
+
 #
 # Autostart programs
 #