diff --git a/bin/lid_close.sh b/bin/lid_close.sh
index 69446cb..43f0c72 100755
--- a/bin/lid_close.sh
+++ b/bin/lid_close.sh
@@ -1,2 +1,25 @@
-#!/bin/bash
-hyprctl keyword monitor "eDP-1, disable"
+#!/usr/bin/env bash
+set -euo pipefail
+
+INTERNAL="eDP-1"
+
+# Count non-internal monitors reported by Hyprland
+external_count=$(
+  hyprctl monitors | awk -v internal="$INTERNAL" '
+    $1 == "Monitor" {
+      name = $2
+      sub(":", "", name)      # strip trailing colon
+      if (name != internal) {
+        print name
+      }
+    }
+  ' | wc -l
+)
+
+# Always turn off the laptop panel on lid close
+hyprctl keyword monitor "$INTERNAL, disable"
+
+# Only lock if there is NO external monitor
+if [ "$external_count" -eq 0 ]; then
+  hyprlock
+fi
diff --git a/bin/lid_open.sh b/bin/lid_open.sh
index 1a7a756..bae6a74 100755
--- a/bin/lid_open.sh
+++ b/bin/lid_open.sh
@@ -1,5 +1,5 @@
-#!/bin/bash
+#!/usr/bin/env bash
 hyprctl keyword monitor "eDP-1, preferred, 0x0, 1"
-hyprlock
+