diff --git a/static/css/hugo-theme.css b/static/css/hugo-theme.css
index d412d4b3f6..6239a5b400 100644
--- a/static/css/hugo-theme.css
+++ b/static/css/hugo-theme.css
@@ -188,7 +188,7 @@ h4 {
 }
 
 h5 {
-  font-size: 1;
+  font-size: 1rem;
   line-height: 110% !important;
   margin: 1rem 0 0.2rem 0;
 }