diff --git a/requirements.txt b/requirements.txt
index d8f2c13e..dec018de 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 
 dogpile.cache>=0.6.2 # BSD
-six>=1.9.0 # MIT
+six>=1.10.0 # MIT
 oslo.config>=4.6.0 # Apache-2.0
 oslo.i18n>=3.15.3 # Apache-2.0
 oslo.log>=3.30.0 # Apache-2.0