diff --git a/requirements.txt b/requirements.txt
index 49332772..1a80d7aa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,4 +3,4 @@ pbr>=0.6,<1.0
 netaddr>=0.7.6
 python-keystoneclient>=0.6.0
 requests>=1.1
-six>=1.4.1
+six>=1.5.2