diff --git a/inbox/user-invite.xml b/inbox/user-invite.xml
index c87a40a1..d90133d4 100644
--- a/inbox/user-invite.xml
+++ b/inbox/user-invite.xml
@@ -21,6 +21,7 @@
     <spec>XEP-0082</spec>
     <spec>XEP-0077</spec>
     <spec>XEP-0147</spec>
+    <spec>XEP-0379</spec>
   </dependencies>
   <supersedes/>
   <supersededby/>
@@ -66,7 +67,20 @@
   </section2>
 </section1>
 <section1 topic='Requirements' anchor='reqs'>
-  <p>STRONGLY RECOMMENDED.</p>
+  <p>This specification makes use of XMPP URIs. The basic URI scheme for XMPP
+    is defined in &rfc5122; and extended in &xep0147; and &xep0379;.
+    Furthermore, this heavily builds upon the blocks provided in
+    <cite>XEP-0379</cite> for landing page and roster subscription.
+  </p>
+  <p>
+    To create out-of-band invitation links, Romeo's server needs to implement
+    the &xep0050; commands specified in the following section, and his client
+    must be able to execute them.
+  </p>
+  <p>
+    Furthermore, Romeo's server SHOULD provide a HTTPS service hosting the
+    landing page.
+  </p>
 </section1>
 <section1 topic='Discovery' anchor='discover'>
   <example caption="Discover available ad-hoc commands"><![CDATA[