diff --git a/web/src/components/MemoContent/Link.tsx b/web/src/components/MemoContent/Link.tsx
index 2b3223ae..aff22cfa 100644
--- a/web/src/components/MemoContent/Link.tsx
+++ b/web/src/components/MemoContent/Link.tsx
@@ -65,7 +65,7 @@ const Link: React.FC<Props> = ({ text, url }: Props) => {
       open={showTooltip}
       arrow
     >
-      <MLink underline="always" target="_blank" href={url}>
+      <MLink underline="always" target="_blank" href={url} rel="noopener noreferrer">
         <span onMouseEnter={handleMouseEnter} onMouseLeave={() => setShowTooltip(false)}>
           {text || url}
         </span>