diff --git a/src/components/layout.css b/src/components/layout.css
index 1b76e8ebec..9533079d54 100644
--- a/src/components/layout.css
+++ b/src/components/layout.css
@@ -622,3 +622,12 @@ pre tt:after {
     font-size: 100%;
   }
 }
+
+h1,
+h2,
+h3,
+h4,
+h5,
+h6 {
+  font-weight: 400;
+}