diff --git a/README.rst b/README.rst
index 522400a1f..874b0c450 100644
--- a/README.rst
+++ b/README.rst
@@ -90,6 +90,11 @@ IRC Channel: #letsencrypt on `Freenode`_
 
 Community: https://community.letsencrypt.org
 
+ACME spec: http://ietf-wg-acme.github.io/acme/
+
+ACME working area in github: https://github.com/ietf-wg-acme/acme
+
+
 Mailing list: `client-dev`_ (to subscribe without a Google account, send an
 email to client-dev+subscribe@letsencrypt.org)