diff --git a/README.md b/README.md
index 8c39efe1..5d67c04d 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
[](https://travis-ci.org/xsf/xeps)
XMPP Extension Protocols (XEPs)
-=========
+===============================
This repository is used to manage work on XMPP Extension Protocols
(XEPs), which are the specifications produced by the XMPP Standards
@@ -32,6 +32,10 @@ defines the standards process followed by the XMPP Standards Foundation.
Building XEPs
-------------
+You'll need xmllint and xsltproc.
+
+On Ubuntu, you can install them with `sudo apt install libxml2-utils xsltproc`
+
To build a single XEP as HTML simply run:
make xep-xxxx.html
diff --git a/xep-0424.xml b/xep-0424.xml
index fb8bbaec..f704b041 100644
--- a/xep-0424.xml
+++ b/xep-0424.xml
@@ -26,6 +26,12 @@
message-retract
&lance;
&jcbrand;
+
+ 0.2.1
+ 2020-03-25
+ jcb
+ Recommend XEP-0428 fallback body and XEP-0334 store hint
+
0.2.0
2019-11-11
@@ -104,7 +110,14 @@
+
+ This person attempted to retract a previous message, but it's unsupported by your client.
+
]]>
+
+
+It's RECOMMENDED that you include a &xep0428; tag with fallback text in the <body/>, so that older clients can still indicate the intent to retract and so that older servers will archive the retraction. Additionally, you MAY include a &xep0334; <store/> hint, to indicate that the stanza needs to be archived.
+