diff --git a/infra/rooch-portal/src/components/banner.tsx b/infra/rooch-portal/src/components/banner.tsx
index 5a11799679..721ead469d 100644
--- a/infra/rooch-portal/src/components/banner.tsx
+++ b/infra/rooch-portal/src/components/banner.tsx
@@ -18,8 +18,10 @@ export const Banner: React.FC<BannerProps> = ({ onClose }) => {
             <span className="sr-only">Rooch</span>
           </span>
           <span>
-            Rooch Portal is at the beta testing version. Learn More about {' '}
+            Rooch Portal is at the beta testing version. Learn More about{' '}
             <a
+              target="_blank"
+              rel="noopener noreferrer"
               href="https://rooch.network/learn/miscellaneous/portal"
               className="inline font-medium text-blue-600 underline dark:text-blue-500 underline-offset-2 decoration-600 dark:decoration-500 decoration-solid hover:text-blue-500 dark:hover:text-blue-400 transition-all"
             >