diff --git a/README.md b/README.md
index af510de..d2324d4 100644
--- a/README.md
+++ b/README.md
@@ -6,11 +6,12 @@ ok
 
 
 
-class="language-plantuml"
+```plantuml
 @startuml
 Alice -> Bob: Authentication Request
 Bob --> Alice: Authentication Response
 
 Alice -> Bob: Another authentication Request
 Alice <-- Bob: Another authentication Response
-@enduml
\ No newline at end of file
+@enduml
+```
\ No newline at end of file