diff --git a/src/vellum-doc.ts b/src/vellum-doc.ts
index 0e883a2..f516047 100644
--- a/src/vellum-doc.ts
+++ b/src/vellum-doc.ts
@@ -63,8 +63,8 @@ export class VellumDocument extends LitElement {
     }
 
     #index h4 {
+      font: 0.9em inherit;
       padding-left: 3em;
-      font: var(--index-level-4-font, 0.9em 'inherit');
     }
 
     #index a {