diff --git a/requirements.txt b/requirements.txt
index bb295c3a0..08c1e0d74 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,5 +16,5 @@ python-keystoneclient
 python-novaclient
 MySQL-python
 PrettyTable>=0.6,<0.8
-six>=1.4.1
+six>=1.7.0
 diskimage-builder