diff --git a/packages/docusaurus-theme-classic/src/theme/Tag/index.tsx b/packages/docusaurus-theme-classic/src/theme/Tag/index.tsx
index 174ef66842..3011c5c841 100644
--- a/packages/docusaurus-theme-classic/src/theme/Tag/index.tsx
+++ b/packages/docusaurus-theme-classic/src/theme/Tag/index.tsx
@@ -20,6 +20,7 @@ export default function Tag({
 }: Props): ReactNode {
   return (
     <Link
+      rel="tag"
       href={permalink}
       title={description}
       className={clsx(