diff --git a/README.adoc b/README.adoc
index b66a6ba..02f8ed0 100644
--- a/README.adoc
+++ b/README.adoc
@@ -6,7 +6,13 @@ It's about object schemas and types and typed links to describe the world as
 dependency graph.
 
 .A bunch of linked objects
+ifdef::textdiagram[]
 [plantuml, format=txt]
+endif::[]
+ifndef::textdiagram[]
+[plantuml, format=svg]
+endif::[]
+
 ----
 @startuml