diff --git a/samples/demo01.md b/samples/demo01.md
index e2c2fda..19de4dd 100644
--- a/samples/demo01.md
+++ b/samples/demo01.md
@@ -30,7 +30,7 @@ export_on_save:
 
 ```plantuml
 @startuml
-!include ../puml/core.puml
+!include ./core.puml
 
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