diff --git a/setup.py b/setup.py
index 727e816..583f79f 100644
--- a/setup.py
+++ b/setup.py
@@ -40,6 +40,7 @@ setuptools.setup(
             'requests',
             'gunicorn',
             'flake8',
+            'pyflakes',
             'Sphinx==1.5.6',
             'sphinxcontrib-httpdomain',
             'sphinx_rtd_theme',