diff --git a/app/posts/[slug]/page.tsx b/app/posts/[slug]/page.tsx
index 6a59788..3f296c2 100644
--- a/app/posts/[slug]/page.tsx
+++ b/app/posts/[slug]/page.tsx
@@ -92,6 +92,7 @@ export default async function PostPage({ params }: { params: Promise<{ slug: str
                           dark: 'github-dark-dimmed',
                         },
                         keepBackground: false,
+                        lineNumbers: true,
                         grid: true,
                         onVisitLine(node: LineElement) {
                           if (node.children.length === 0) {