diff --git a/README.md b/README.md
index 7b49ddf..3102a92 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,7 @@
 # MARGO: Mozilla ARchive library written in Go
 
+Review branch, not for merge.
+
 [![Build Status](https://travis-ci.org/mozilla-services/margo.svg?branch=master)](https://travis-ci.org/mozilla-services/margo)
 [![GoDoc](https://godoc.org/go.mozilla.org/mar?status.svg)](https://godoc.org/go.mozilla.org/mar) 
 [![Coverage Status](https://coveralls.io/repos/github/mozilla-services/margo/badge.svg?branch=master)](https://coveralls.io/github/mozilla-services/margo?branch=master)