diff --git a/src/theme/css/general.css b/src/theme/css/general.css
index b5240244..11e1b922 100644
--- a/src/theme/css/general.css
+++ b/src/theme/css/general.css
@@ -170,4 +170,5 @@ blockquote {
 .chapter li.part-title {
     color: var(--sidebar-fg);
     margin: 5px 0px;
+    font-weight: bold;
 }