diff --git a/samples/demo01.md b/samples/demo01.md
index 9cb56c5..343850e 100644
--- a/samples/demo01.md
+++ b/samples/demo01.md
@@ -72,7 +72,7 @@ export_on_save:
 ```
 # 时序图-相对路径2
 
-```plantuml ｛align="center"}
+```plantuml
 @startuml
 ' !include ../puml/core.puml
 !include https://deep-tek.com/puml/core.puml