diff --git a/README b/README
index 3c6361c..9975324 100644
--- a/README
+++ b/README
@@ -8,3 +8,9 @@ How to Contribute to the Document
 ---------------------------------
 
 You can make pull request to the xml document. We are looking for comments from passive DNS developers in order to improve the document.
+
+IETF Internet-Draft
+-------------------
+
+- [Version 5 published as Internet-Draft](https://datatracker.ietf.org/doc/draft-dulaunoy-dnsop-passive-dns-cof/) - February 10, 2019
+