diff --git a/draft-ietf-scitt-architecture.md b/draft-ietf-scitt-architecture.md
index a8505205..955300c0 100644
--- a/draft-ietf-scitt-architecture.md
+++ b/draft-ietf-scitt-architecture.md
@@ -1412,3 +1412,9 @@ Registry {{IANA.params}}, following the template in {{RFC3553}}:
 # Sequence Diagram
 
 ...
+
+
+```` mermaid
+sequenceDiagram
+    participant Issuer
+````
\ No newline at end of file