diff --git a/lower-constraints.txt b/lower-constraints.txt
index 5fdd4dd5fc..d29de0ab99 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -41,7 +41,7 @@ jsonschema==2.6.0
 keystoneauth1==3.14.0
 kombu==4.0.0
 linecache2==1.0.0
-MarkupSafe==1.0
+MarkupSafe==1.1.0
 mccabe==0.2.1
 mock==2.0.0
 monotonic==0.6