diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index fc0b2b0e8e..f688b9b4ba 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -2759,6 +2759,7 @@ a.account__display-name {
       flex: 0 1 auto;
       display: flex;
       flex-direction: column;
+      contain: inline-size layout paint style;
 
       @media screen and (min-width: $no-gap-breakpoint) {
         max-width: 600px;
@@ -4032,6 +4033,7 @@ $ui-header-logo-wordmark-width: 99px;
   overflow: hidden;
   border: 1px solid var(--background-border-color);
   border-radius: 8px;
+  contain: inline-size layout paint style;
 
   &.bottomless {
     border-radius: 8px 8px 0 0;