diff --git a/index.js b/index.js
index 196d467..10dffdf 100644
--- a/index.js
+++ b/index.js
@@ -10,7 +10,9 @@ const devtools = {
 	orientation: undefined,
 };
 
-const threshold = 170;
+// Increased threshold to reduce false positives on high-resolution and vertical monitors
+// Previous value of 170 caused false positives on 1920x1980 and similar resolutions
+const threshold = 200;
 
 const emitEvent = (isOpen, orientation) => {
 	globalThis.dispatchEvent(new globalThis.CustomEvent('devtoolschange', {
@@ -22,8 +24,15 @@ const emitEvent = (isOpen, orientation) => {
 };
 
 const main = ({emitEvents = true} = {}) => {
-	const widthThreshold = globalThis.outerWidth - globalThis.innerWidth > threshold;
-	const heightThreshold = globalThis.outerHeight - globalThis.innerHeight > threshold;
+	// Calculate the difference between outer and inner window dimensions
+	const widthDifference = globalThis.outerWidth - globalThis.innerWidth;
+	const heightDifference = globalThis.outerHeight - globalThis.innerHeight;
+	
+	// Check if the differences exceed the threshold
+	// Added additional check: differences should be reasonable (< 600) to avoid false positives
+	// on unusual monitor configurations like 1920x1980 vertical displays
+	const widthThreshold = widthDifference > threshold && widthDifference < 600;
+	const heightThreshold = heightDifference > threshold && heightDifference < 600;
 	const orientation = widthThreshold ? 'vertical' : 'horizontal';
 
 	if (