diff --git a/public/js/reader.js b/public/js/reader.js
index 575d3ba..9b17276 100644
--- a/public/js/reader.js
+++ b/public/js/reader.js
@@ -56,7 +56,7 @@ const readerComponent = () => {
 					}
 
 					// Preload Images
-					this.preloadLookahead = +localStorage.getItem('preloadLookahead') ?? 3;
+					this.preloadLookahead = +(localStorage.getItem('preloadLookahead') ?? 3);
 					const limit = Math.min(page + this.preloadLookahead, this.items.length + 1);
 					for (let idx = page + 1; idx <= limit; idx++) {
 						this.preloadImage(this.items[idx - 1].url);