diff --git a/README.rst b/README.rst
index 572e5b4..a67fcc9 100644
--- a/README.rst
+++ b/README.rst
@@ -8,6 +8,8 @@ functionality of `Puppet Dashboard`_.
 Puppetboard relies on the `pypuppetdb`_ library to fetch data from PuppetDB
 and is built with the help of the `Flask`_ microframework.
 
+As of version 0.1.0 and higher, Puppetboard **requires** PuppetDB 3.
+
 .. _pypuppetdb: https://pypi.python.org/pypi/pypuppetdb
 .. _PuppetDB: http://docs.puppetlabs.com/puppetdb/latest/index.html
 .. _Puppet Dashboard: http://docs.puppetlabs.com/dashboard/