diff --git a/web/assets/css/guestbook_admin.css b/web/assets/css/guestbook_admin.css
index e0e7684..b5e5cd3 100755
--- a/web/assets/css/guestbook_admin.css
+++ b/web/assets/css/guestbook_admin.css
@@ -12,7 +12,7 @@ form {
 	grid-template-columns: 1fr 1fr;
 	width: 100%; }
 
-form header { grid-area: 'h'; }
+form header { grid-area: h; }
 
 textarea {
 	background-color: var(--background-color);