diff --git a/fvid/cythonizer.py b/fvid/cythonizer.py
new file mode 100644
index 0000000..a72eedc
--- /dev/null
+++ b/fvid/cythonizer.py
@@ -0,0 +1,6 @@
+#cython: language_level = 3
+from distutils.core import Extension, setup
+from Cython.Build import cythonize
+
+ext = Extension(name="fvid_cython", sources=["fvid_cython.pyx"])
+setup(ext_modules=cythonize(ext, compiler_directives={'language_level': 3, 'infer_types': True}))