diff --git a/lower-constraints.txt b/lower-constraints.txt
index ad911e771..e42efc6a3 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -2,7 +2,7 @@ amqp==2.1.1
 aodhclient==0.9.0
 appdirs==1.3.0
 asn1crypto==0.23.0
-Babel==2.3.4
+Babel==2.9.1
 bandit==1.1.0
 cachetools==2.0.0
 cffi==1.7.0