diff --git a/rfc/index.md b/rfc/index.md
index ddc4693..80a0bda 100644
--- a/rfc/index.md
+++ b/rfc/index.md
@@ -14,6 +14,7 @@ Also see IANA assignments, https://www.iana.org/protocols
 5234	Augmented BNF for Syntax Specifications: ABNF
 5322	Internet Message Format
 5598	Internet Mail Architecture
+6854	Update to Internet Message Format to Allow Group Syntax in the "From:" and "Sender:" Header Fields
 7405	Case-Sensitive String Support in ABNF
 
 # SMTP