diff --git a/requirements.txt b/requirements.txt
index 6026e37fd..0f5366425 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,4 +6,4 @@ oslo.config>=1.2.0
 pbr>=0.6,!=0.7,<1.0
 PrettyTable>=0.7,<0.8
 requests>=1.1
-six>=1.5.2
+six>=1.6.0