diff --git a/src/components/CourseCard.tsx b/src/components/CourseCard.tsx
index 197a19a..0bd136f 100644
--- a/src/components/CourseCard.tsx
+++ b/src/components/CourseCard.tsx
@@ -27,7 +27,7 @@ export default function CourseCard({ course, onSelect, onUnlockRequest, subscrip
       className={`group relative glass-card glass-card-hover rounded-xl overflow-hidden cursor-pointer flex flex-col h-full transition-all duration-300 ${!isUnlocked ? 'filter grayscale brightness-75 hover:brightness-100 hover:grayscale-0' : ''}`}
     >
       {/* Thumbnail */}
-      <div className="relative w-full aspect-video overflow-hidden">
+      <div className="relative w-full aspect-[3/4] overflow-hidden">
         <img 
           src={course.thumbnail} 
           alt={course.title}