diff --git a/panorama-viewer.js b/panorama-viewer.js
index 0ff5b76..9a75c76 100644
--- a/panorama-viewer.js
+++ b/panorama-viewer.js
@@ -186,7 +186,7 @@
 	let zoom = 3;
 	viewer.addEventListener("wheel", (evt) => {
 		console.log(evt.deltaY);
-		zoom = Math.max(zoom + evt.deltaY * 0.75, minZoom);
+		zoom = Math.max(zoom * (1 - evt.deltaY * 0.005), minZoom);
 		evt.preventDefault();
 	});