diff --git a/site/content/docs/4.3/examples/checkout/index.html b/site/content/docs/4.3/examples/checkout/index.html
index b351fda5c7..bf65f9fbd7 100644
--- a/site/content/docs/4.3/examples/checkout/index.html
+++ b/site/content/docs/4.3/examples/checkout/index.html
@@ -2,7 +2,7 @@
 layout: examples
 title: Checkout example
 extra_css:
-- "form-validation.css"
+  - "form-validation.css"
 extra_js:
   - src: "form-validation.js"
 body_class: "bg-light"