diff --git a/app/javascript/mastodon/features/account/components/header.js b/app/javascript/mastodon/features/account/components/header.js
index 0a3345f0edea9..d957de73d7bd3 100644
--- a/app/javascript/mastodon/features/account/components/header.js
+++ b/app/javascript/mastodon/features/account/components/header.js
@@ -212,7 +212,7 @@ class Header extends ImmutablePureComponent {
 
         <div className='account__header__bar'>
           <div className='account__header__tabs'>
-            <a className='avatar' href={account.get('url')} target='_blank'>
+            <a className='avatar' href={account.get('url')} rel='noopener' target='_blank'>
               <Avatar account={account} size={90} />
             </a>