diff --git a/README.md b/README.md
index 7057c507..35b729ed 100644
--- a/README.md
+++ b/README.md
@@ -134,11 +134,12 @@ Style Guide
 ------------
 
 To ensure that changes and patches are focused on behavior changes,
-the zipline codebase adheres to PEP-8,
-<http://www.python.org/dev/peps/pep-0008/>.
+the zipline codebase adheres to both PEP-8,
+<http://www.python.org/dev/peps/pep-0008/>, and pyflakes,
+<https://launchpad.net/pyflakes/>.
 
 The maintainers check the code using the flake8 script,
-<https://github.com/jcrocholl/pep8/>, which is included in the
+<https://github.com/bmcustodio/flake8>, which is included in the
 requirements_dev.txt.
 
 Before submitting patches or pull requests, please ensure that your