diff --git a/setup.py b/setup.py
index 8d08855..ea0abf1 100644
--- a/setup.py
+++ b/setup.py
@@ -35,9 +35,10 @@
 
 import sys
 
-from distutils.core import setup
-from distutils.extension import Extension
+from setuptools import setup
+from setuptools import Extension
 from distutils.command.build_ext import build_ext
+from Cython.Build import cythonize
 
 if 'bdist_egg' in sys.argv:
     sys.stderr.write("""===========================================================
@@ -53,6 +54,7 @@ and install with:
 
 
 ext_modules = [Extension("rfoo.marsh", ["rfoo/marsh.pyx"])]
+ext_modules = cythonize(ext_modules)
 
 
 setup(