diff --git a/xep.ent b/xep.ent
index 62e8e9e3..481849e6 100644
--- a/xep.ent
+++ b/xep.ent
@@ -690,6 +690,7 @@ THE SOFTWARE.
 <!ENTITY rfc7712 "<span class='ref'><link url='http://tools.ietf.org/html/rfc7712'>RFC 7712</link></span> <note>RFC 7712: Domain Name Associations (DNA) in the Extensible Messaging and Presence Protocol (XMPP)&lt;<link url='http://tools.ietf.org/html/rfc7712'>http://tools.ietf.org/html/rfc7712</link>&gt;.</note>" >
 <!ENTITY rfc7764 "<span class='ref'><link url='http://tools.ietf.org/html/rfc7764'>RFC 7764</link></span> <note>RFC 7764: Guidance on Markdown: Design Philosophies, Stability Strategies, and Select Registrations &lt;<link url='http://tools.ietf.org/html/rfc7764'>http://tools.ietf.org/html/rfc7764</link>&gt;.</note>" >
 <!ENTITY rfc7830 "<span class='ref'><link url='http://tools.ietf.org/html/rfc7830'>RFC 7830</link></span> <note>RFC 7830: The EDNS(0) Padding Option &lt;<link url='http://tools.ietf.org/html/rfc7830'>http://tools.ietf.org/html/rfc7830</link>&gt;.</note>" >
+<!ENTITY rfc8174 "<span class='ref'><link url='http://tools.ietf.org/html/rfc8174'>RFC 8174</link></span> <note>RFC 8174: Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words &lt;<link url='http://tools.ietf.org/html/rfc8174'>http://tools.ietf.org/html/rfc8174</link>&gt;.</note>" >
 <!ENTITY rfc8264 "<span class='ref'><link url='http://tools.ietf.org/html/rfc8264'>RFC 8264</link></span> <note>RFC 8264: PRECIS Framework: Preparation, Enforcement, and Comparison of Internationalized Strings in Application Protocols &lt;<link url='http://tools.ietf.org/html/rfc8264'>http://tools.ietf.org/html/rfc8264</link>&gt;.</note>" >
 <!ENTITY rfc8446 "<span class='ref'><link url='http://tools.ietf.org/html/rfc8446'>RFC 8446</link></span> <note>RFC 8446: The Transport Layer Security (TLS) Protocol Version 1.3 &lt;<link url='http://tools.ietf.org/html/rfc8446'>http://tools.ietf.org/html/rfc8446</link>&gt;.</note>" >
 <!ENTITY rfc8467 "<span class='ref'><link url='http://tools.ietf.org/html/rfc8467'>RFC 8467</link></span> <note>RFC 8467: Padding Policies for Extension Mechanisms for DNS (EDNS(0)) &lt;<link url='http://tools.ietf.org/html/rfc8467'>http://tools.ietf.org/html/rfc8467</link>&gt;.</note>" >