diff --git a/requirements.txt b/requirements.txt
index a39644c5..837c3fb3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,3 +3,4 @@ scipy
 ipython
 matplotlib
 cython
+future
diff --git a/setup.py b/setup.py
index a52bfe2c..b181c40b 100644
--- a/setup.py
+++ b/setup.py
@@ -87,7 +87,8 @@ setup(
     packages = find_packages(),
     install_requires = ['numpy>=1.7',
                         'scipy>=0.13',
-                        'Cython'
+                        'Cython',
+                        'future'
                        ],
     author = "Rowan Cockett",
     author_email = "rowan@3ptscience.com",