diff --git a/requirements.txt b/requirements.txt
index e1e0db2a1b..01ddae1822 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -9,7 +9,7 @@ lockfile>=0.8
 lxml>=2.3
 WebOb>=1.2.3
 greenlet>=0.3.2
-futures>=2.1.3
+futures>=2.1.6
 sqlalchemy-migrate>=0.9.1
 netaddr>=0.7.6
 paramiko>=1.13.0