diff --git a/setup.py b/setup.py
index 3ec3c06..837b699 100644
--- a/setup.py
+++ b/setup.py
@@ -87,7 +87,7 @@ def is_requirement(line):
     install_requires=[
         'XBlock==1.2.9',
         'Mako',
-        'futures==3.2.0',
+        'futures==3.2.0; python_version == "2.7"',
         'jsonschema==2.6.0',
         'lxml==3.8.0',
         'web-fragments==0.2.2',