diff --git a/requirements.txt b/requirements.txt
index 479b4d2..52ace30 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,4 +11,4 @@ monasca-common>=1.0.0 # Apache-2.0
 oslo.config!=3.18.0,>=3.14.0 # Apache-2.0
 oslo.log>=3.11.0 # Apache-2.0
 oslo.service>=1.10.0 # Apache-2.0
-tooz>=1.28.0 # Apache-2.0
+tooz>=1.47.0 # Apache-2.0