diff --git a/conversations.doap b/conversations.doap
index de770d0ce..d99e60656 100644
--- a/conversations.doap
+++ b/conversations.doap
@@ -460,6 +460,13 @@
             <xmpp:version>0.2.0</xmpp:version>
         </xmpp:SupportedXep>
     </implements>
+    <implements>
+        <xmpp:SupportedXep>
+            <xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0440.html"/>
+            <xmpp:status>complete</xmpp:status>
+            <xmpp:version>0.4.0</xmpp:version>
+        </xmpp:SupportedXep>
+    </implements>
     <implements>
         <xmpp:SupportedXep>
             <xmpp:xep rdf:resource="https://xmpp.org/extensions/xep-0454.html"/>