diff --git a/requirements.txt b/requirements.txt
index af02091311..8239af81d3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,6 +24,6 @@ oslo.service>=1.10.0 # Apache-2.0
 oslo.utils>=3.18.0 # Apache-2.0
 oslo.vmware>=2.15.0 # Apache-2.0
 PrettyTable<0.8,>=0.7.1 # BSD
-tooz>=1.28.0 # Apache-2.0
+tooz>=1.47.0 # Apache-2.0
 decorator>=3.4.0 # BSD
 vmware-nsxlib>=0.6.0 # Apache-2.0