diff --git a/samples/demo01.md b/samples/demo01.md
index f9febff..7b9f373 100644
--- a/samples/demo01.md
+++ b/samples/demo01.md
@@ -36,7 +36,7 @@ export_on_save:
 
 ```plantuml
 @startuml
-!include ../puml/cerulean/puml-theme-cerulean.puml
+!include https://deep-tek.com/puml/cerulean/puml-theme-cerulean.puml
 
 participant participant as Foo
 actor       actor       as Foo1