diff --git a/docs/.island/config.ts b/docs/.island/config.ts
index ccbaea43..d42822bd 100644
--- a/docs/.island/config.ts
+++ b/docs/.island/config.ts
@@ -17,7 +17,8 @@ export default defineConfig({
   },
   markdown: {
     rehypePlugins: [],
-    remarkPlugins: []
+    remarkPlugins: [],
+    lineNumbers: true
   },
   route: {
     exclude: ['custom.tsx', '**/fragments/**']
diff --git a/src/node/plugin-mdx/pluginMdxRollup.ts b/src/node/plugin-mdx/pluginMdxRollup.ts
index 2bf575cf..30880c40 100644
--- a/src/node/plugin-mdx/pluginMdxRollup.ts
+++ b/src/node/plugin-mdx/pluginMdxRollup.ts
@@ -68,7 +68,7 @@ export async function pluginMdxRollup(
         }
       ],
       rehypePluginPreWrapper,
-      ...(config.markdown?.lineNumbers ? rehypePluginLineNumbers : []),
+      ...(config.markdown?.lineNumbers ? [rehypePluginLineNumbers] : []),
       ...(config.markdown?.rehypePlugins || [])
     ]
   }) as Plugin;
diff --git a/src/theme-default/styles/doc.css b/src/theme-default/styles/doc.css
index c35ffc96..6ea00673 100644
--- a/src/theme-default/styles/doc.css
+++ b/src/theme-default/styles/doc.css
@@ -357,7 +357,6 @@
   bottom: 0;
   left: 0;
   z-index: 3;
-  border-right: 1px solid var(--island-c-divider-dark-2);
   padding-top: 16px;
   width: 36px;
   text-align: center;