diff --git a/lower-constraints.txt b/lower-constraints.txt
index bddc7c4d..5c48ebd9 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -27,7 +27,7 @@ Jinja2==2.10
 jsonschema==2.6.0
 kazoo==2.2
 keystoneauth1==3.4.0
-kombu==4.0.0
+kombu==4.6.11
 linecache2==1.0.0
 Mako==0.4.0
 MarkupSafe==1.0