diff --git a/README.md b/README.md
index cb187e9..08dc93e 100644
--- a/README.md
+++ b/README.md
@@ -84,3 +84,6 @@ def printAddressBook(fd):
 f = open('example', 'r')
 printAddressBook(f.fileno())
 ```
+
+## PyPy
+There is also a preliminary branch that works for pypy. Unfortunately it requires some pretty terrible hacks to get working, so you I've left it in it's own branch. Just do `git checkout pypy` and then install like normal `pypy setup.py install` or `pip install .`. Don't forget to install dependencies beforehand with `pip install -U cython setuptools`