diff --git a/www/code/mermaid.css b/www/code/mermaid.css
index 0802db0e0..60c366bb6 100644
--- a/www/code/mermaid.css
+++ b/www/code/mermaid.css
@@ -123,7 +123,6 @@ text.actor {
 }
 .sectionTitle, .titleText {
     font-weight: bold;
-    text-decoration: underline;
 }
 
 /* Grid and axis */