diff --git a/README.md b/README.md
index 079b39c7..1aea6713 100644
--- a/README.md
+++ b/README.md
@@ -110,6 +110,12 @@ This repo is used to capture architectural and design decisions as a reference o
 |[ADR-38](adr/ADR-38.md)|server, security|OCSP Peer Verification|
 |[ADR-39](adr/ADR-39.md)|server, security|Certificate Store|
 
+## Spec
+
+|Index|Tags|Description|
+|-----|----|-----------|
+|[ADR-40](adr/ADR-40.md)|spec|NATS Connection|
+
 ## When to write an ADR
 
 Not every little decision needs an ADR, and we are not overly prescriptive about the format apart from the initial header format.