diff --git a/flow/overview/README.md b/flow/overview/README.md
index c1c04e9..9a24006 100644
--- a/flow/overview/README.md
+++ b/flow/overview/README.md
@@ -7,7 +7,7 @@
   <pre class="mermaid">
     flowchart LR
       id1:::terminal([Start])
-      classDef terminal fill:#0f0 stroke:#000
+      classDef terminal fill:#0f0,stroke:#000
   </pre>
 {% endraw %}