diff --git a/docs/authors-guide/spec-up-t-demo-site.mdx b/docs/authors-guide/spec-up-t-demo-site.mdx
index fa135a47..f5183ebd 100644
--- a/docs/authors-guide/spec-up-t-demo-site.mdx
+++ b/docs/authors-guide/spec-up-t-demo-site.mdx
@@ -6,4 +6,4 @@ import IframeComponent from '@site/src/components/IframeComponent';
 
 # Spec-Up-T demo site
 
-<IframeComponent src="../../spec-up-t-demo/docs/index.html" width="100%" />
+<IframeComponent src="/spec-up-t-demo/docs/index.html" width="100%" />