diff --git a/app/assets/stylesheets/rich-text-content.css b/app/assets/stylesheets/rich-text-content.css
index 1fa0c0759..5e871260f 100644
--- a/app/assets/stylesheets/rich-text-content.css
+++ b/app/assets/stylesheets/rich-text-content.css
@@ -375,6 +375,12 @@
     }
   }
 
+  action-text-attachment[content-type^='application/vnd.actiontext.mention'] {
+    img {
+      object-fit: cover;
+    }
+  }
+
   [data-lexical-cursor] {
     animation: blink 1s step-end infinite;
     block-size: 1lh;