diff --git a/README.md b/README.md
index 689e535..401f91d 100644
--- a/README.md
+++ b/README.md
@@ -23,3 +23,14 @@ Shared groovy libraries
 
 ## Make
 Common Makefile include
+
+# Mermaid test
+```mermaid
+stateDiagram-v2
+   [*] --> select_date
+   select_date --> select_time
+   select_time --> current_status
+   current_status --> cancel: status_available
+   current_status --> [*]: status_over
+   cancel --> [*]
+```