diff --git a/server.ts b/server.ts
index 51ebe0c..37c4f91 100644
--- a/server.ts
+++ b/server.ts
@@ -361,8 +361,7 @@ app.get('/api/courses', authenticateToken, async (req: AuthenticatedRequest, res
       id: course.id,
       title: course.title,
       description: course.description,
-      thumbnailUrl: course.thumbnailUrl,
-      videoUrl: course.videoUrl,
+      thumbnail: course.thumbnail,
       isLocked: course.isLocked,
       price: course.price,
       category: course.category,