diff --git a/static/themes/default/css/plinth.css b/static/themes/default/css/plinth.css
index 6330869c8..20184e207 100644
--- a/static/themes/default/css/plinth.css
+++ b/static/themes/default/css/plinth.css
@@ -364,3 +364,8 @@ a.menu_link_active {
 .background-system {
     background-image: url('../img/system-background.svg');
 }
+
+.turbolinks-progress-bar {
+    height: 3px;
+    background-color: white;
+}