diff --git a/xep.ent b/xep.ent
index 572233f1..fce258da 100644
--- a/xep.ent
+++ b/xep.ent
@@ -895,3 +895,5 @@
 <!ENTITY xep0217 "<span class='ref'><link url='http://www.xmpp.org/extensions/xep-0217.html'>Simplified Encrypted Session Negotiation</link></span> <note>XEP-0217: Simplified Encrypted Session Negotiation &lt;<link url='http://www.xmpp.org/extensions/xep-0217.html'>http://www.xmpp.org/extensions/xep-0217.html</link>&gt;.</note>" >
 <!ENTITY xep0218 "<span class='ref'><link url='http://www.xmpp.org/extensions/xep-0218.html'>Bootstrapping Implementation of Encrypted Sessions</link></span> <note>XEP-0218: Bootstrapping Implementation of Encrypted Sessions &lt;<link url='http://www.xmpp.org/extensions/xep-0218.html'>http://www.xmpp.org/extensions/xep-0218.html</link>&gt;.</note>" >
 <!ENTITY xep0219 "<span class='ref'><link url='http://www.xmpp.org/extensions/xep-0219.html'>Hop Check</link></span> <note>XEP-0219: Hop Check &lt;<link url='http://www.xmpp.org/extensions/xep-0219.html'>http://www.xmpp.org/extensions/xep-0219.html</link>&gt;.</note>" >
+<!ENTITY xep0220 "<span class='ref'><link url='http://www.xmpp.org/extensions/xep-0220.html'>Server Dialback</link></span> <note>XEP-0220: Server Dialback &lt;<link url='http://www.xmpp.org/extensions/xep-0220.html'>http://www.xmpp.org/extensions/xep-0220.html</link>&gt;.</note>" >
+<!ENTITY xep0221 "<span class='ref'><link url='http://www.xmpp.org/extensions/xep-0221.html'>Data Forms Media Element</link></span> <note>XEP-0221: Data Forms Media Element &lt;<link url='http://www.xmpp.org/extensions/xep-0221.html'>http://www.xmpp.org/extensions/xep-0221.html</link>&gt;.</note>" >