diff --git a/requirements.txt b/requirements.txt
index 8f75ee4..408c857 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,6 +6,6 @@ pbr!=2.1.0,>=2.0.0 # Apache-2.0
 Jinja2!=2.9.0,!=2.9.1,!=2.9.2,!=2.9.3,!=2.9.4,>=2.8 # BSD License (3 clause)
 oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
 psutil>=3.2.2 # BSD
-six>=1.9.0 # MIT
+six>=1.10.0 # MIT
 oslo.i18n>=3.15.3 # Apache-2.0
 oslo.utils>=3.31.0 # Apache-2.0