diff --git a/requirements.txt b/requirements.txt
index 6c8f29d..7b5fc7e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 pyOpenSSL
 typing ; python_version < "3.5"
 webcolors
-future
+future; python_version < "3.2"
 atomicwrites
 attrs
 logbook