diff --git a/src/styles/cards.css b/src/styles/cards.css
index 8924658..994cc99 100644
--- a/src/styles/cards.css
+++ b/src/styles/cards.css
@@ -76,6 +76,9 @@ a.mbox-img:focus {
   white-space: nowrap;
 }
 
+.mbox-username {
+  font-weight: 600;
+}
 .mbox-kind0-name {
   color: var(--color-accent);
 }