diff --git a/setup.py b/setup.py
index aafaf47..9f178e5 100644
--- a/setup.py
+++ b/setup.py
@@ -49,7 +49,7 @@
 
     packages=find_packages(exclude=['docs', 'fixtures', 'requirements', 'tests*']),
 
-    install_requires=['lxml', 'six'],
+    install_requires=['future', 'lxml', 'six'],
 
     include_package_data=True
 )