diff --git a/src/css/vendor/spring-tabs.css b/src/css/vendor/spring-tabs.css
index afcfba5..7c99d5f 100644
--- a/src/css/vendor/spring-tabs.css
+++ b/src/css/vendor/spring-tabs.css
@@ -68,3 +68,7 @@
   padding: 1rem;
   background-color: var(--tabs-group-background-color);
 }
+
+.doc li.tab[data-sync-id="Xml"] {
+  text-transform: uppercase;
+}