diff --git a/requirements.txt b/requirements.txt
index 27f578bd..d1109f38 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ debtcollector>=1.2.0 # Apache-2.0
 
 # for jsonutils
 six>=1.9.0 # MIT
-cachetools>=1.0.0 # MIT License
+cachetools>=1.1.0 # MIT License
 
 
 # FIXME(markmc): remove this when the drivers no longer