diff --git a/web/src/components/MemoContent/AutoLink.tsx b/web/src/components/MemoContent/AutoLink.tsx
deleted file mode 100644
index 4c747b82..00000000
--- a/web/src/components/MemoContent/AutoLink.tsx
+++ /dev/null
@@ -1,17 +0,0 @@
-interface Props {
-  url: string;
-}
-
-const AutoLink: React.FC<Props> = ({ url }: Props) => {
-  return (
-    <a
-      className="text-blue-600 dark:text-blue-400 cursor-pointer underline break-all hover:opacity-80 decoration-1"
-      href={url}
-      target="_blank"
-    >
-      {url}
-    </a>
-  );
-};
-
-export default AutoLink;
diff --git a/web/src/components/MemoContent/Link.tsx b/web/src/components/MemoContent/Link.tsx
index 904c9820..1acd8726 100644
--- a/web/src/components/MemoContent/Link.tsx
+++ b/web/src/components/MemoContent/Link.tsx
@@ -1,6 +1,6 @@
 interface Props {
-  text: string;
   url: string;
+  text?: string;
 }
 
 const Link: React.FC<Props> = ({ text, url }: Props) => {
@@ -9,8 +9,9 @@ const Link: React.FC<Props> = ({ text, url }: Props) => {
       className="text-blue-600 dark:text-blue-400 cursor-pointer underline break-all hover:opacity-80 decoration-1"
       href={url}
       target="_blank"
+      rel="noopener noreferrer"
     >
-      {text}
+      {text || url}
     </a>
   );
 };
diff --git a/web/src/components/MemoContent/Renderer.tsx b/web/src/components/MemoContent/Renderer.tsx
index eee2c944..2eb0062f 100644
--- a/web/src/components/MemoContent/Renderer.tsx
+++ b/web/src/components/MemoContent/Renderer.tsx
@@ -22,7 +22,6 @@ import {
   TextNode,
   UnorderedListNode,
 } from "@/types/proto/api/v2/markdown_service";
-import AutoLink from "./AutoLink";
 import Blockquote from "./Blockquote";
 import Bold from "./Bold";
 import BoldItalic from "./BoldItalic";
@@ -85,7 +84,7 @@ const Renderer: React.FC<Props> = ({ node }: Props) => {
     case NodeType.LINK:
       return <Link {...(node.linkNode as LinkNode)} />;
     case NodeType.AUTO_LINK:
-      return <AutoLink {...(node.autoLinkNode as AutoLinkNode)} />;
+      return <Link {...(node.autoLinkNode as AutoLinkNode)} />;
     case NodeType.TAG:
       return <Tag {...(node.tagNode as TagNode)} />;
     case NodeType.STRIKETHROUGH:
diff --git a/web/src/pages/UserProfile.tsx b/web/src/pages/UserProfile.tsx
index d474cdc5..7a2cd19b 100644
--- a/web/src/pages/UserProfile.tsx
+++ b/web/src/pages/UserProfile.tsx
@@ -95,7 +95,12 @@ const UserProfile = () => {
                 <UserAvatar className="!w-20 !h-20 mb-2 drop-shadow" avatarUrl={user?.avatarUrl} />
                 <div className="w-full flex flex-row justify-center items-center">
                   <p className="text-3xl text-black leading-none opacity-80 dark:text-gray-200">{user?.nickname}</p>
-                  <a className="ml-1 cursor-pointer text-gray-500" href={`/u/${user?.id}/rss.xml`} target="_blank">
+                  <a
+                    className="ml-1 cursor-pointer text-gray-500"
+                    href={`/u/${user?.id}/rss.xml`}
+                    target="_blank"
+                    rel="noopener noreferrer"
+                  >
                     <Icon.Rss className="w-5 h-auto opacity-60 mt-0.5" />
                   </a>
                 </div>