diff --git a/layouts/partials/head.html b/layouts/partials/head.html
index f17b458..3319bc8 100644
--- a/layouts/partials/head.html
+++ b/layouts/partials/head.html
@@ -55,9 +55,11 @@
 {{- $license_css := (resources.Get "css/core/license.css") }}
 {{- $common := (resources.Match "css/common/*.css") | resources.Concat "assets/css/common.css" }}
 
+{{- /* markup.highlight.noClasses should be set to `false` */}}
+{{- $chroma_styles := (resources.Get "css/includes/chroma-styles.css") }}
 
 {{- /* order is important */}}
-{{- $core := (slice $theme_vars $reset $common $includes_all $media) | resources.Concat "assets/css/core.css" | resources.Minify }}
+{{- $core := (slice $theme_vars $reset $common $chroma_styles $includes_all $media) | resources.Concat "assets/css/core.css" | resources.Minify }}
 {{- $extended := (resources.Match "css/extended/*.css") | resources.Concat "assets/css/extended.css" | resources.Minify }}
 
 {{- /* bundle all required css */}}