diff --git a/docs/source/_static/custom.css b/docs/source/_static/custom.css
index d7f5a3c3..a0867506 100644
--- a/docs/source/_static/custom.css
+++ b/docs/source/_static/custom.css
@@ -32,3 +32,10 @@ html {
 .toctree-wrapper li[class^="toctree-l"] > a {
   font-size: 1em;
 }
+
+.bd-article-container h3,
+.bd-article-container h4,
+.bd-article-container h5,
+.bd-article-container h6 {
+  font-weight: 500;
+}