diff --git a/psi.doap b/psi.doap
index 194b7e6ac..57b288ad3 100644
--- a/psi.doap
+++ b/psi.doap
@@ -423,6 +423,7 @@
       <xmpp:SupportedXep>
         <xmpp:xep rdf:resource='https://xmpp.org/extensions/xep-0153.html'/>
         <xmpp:status>complete</xmpp:status>
+        <xmpp:version>1.1.1</xmpp:version>
       </xmpp:SupportedXep>
     </implements>