diff --git a/archetypes/default.adoc b/archetypes/default.adoc
index 90efe93..d3e4127 100644
--- a/archetypes/default.adoc
+++ b/archetypes/default.adoc
@@ -11,5 +11,6 @@ toc: false
 ---
 
 :source-highlighter: pygments
+:experimental: true
 :toc:
 :toclevels: 2