diff --git a/docs/_static/custom.css b/docs/_static/custom.css
index ef9e560..b0fba9c 100644
--- a/docs/_static/custom.css
+++ b/docs/_static/custom.css
@@ -1,5 +1,6 @@
 :root {
     --pst-font-family-base: 'Noto Sans', sans-serif;
+    --pst-font-family-base-system: 'Noto Sans', sans-serif;
     --pst-font-family-monospace: 'Noto Sans Mono', monospace;
 }