diff --git a/rtd_requirements.txt b/rtd_requirements.txt
index 6a0e7c0..06b7305 100644
--- a/rtd_requirements.txt
+++ b/rtd_requirements.txt
@@ -1,2 +1,3 @@
 django>=1.5,<1.6
 six
+future
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 8db714b..902605f 100755
--- a/setup.py
+++ b/setup.py
@@ -45,6 +45,7 @@ setup(
     ],
     packages=find_packages(),
     install_requires=[
-        'six>=1.6.1'
+        'six>=1.6.1',
+        'future>=0.15.2'
     ]
 )