diff --git a/requirements.txt b/requirements.txt
index 76ecae7..a072ac0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,4 +3,4 @@
 # process, which may cause wedges in the gate later.
 
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
-six>=1.9.0 # MIT
+six>=1.10.0 # MIT