diff --git a/lower-constraints.txt b/lower-constraints.txt
index bf8470e177..6ccbdc2302 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -50,6 +50,7 @@ python-ldap===3.0.0
 pymongo===3.0.2
 pysaml2==4.5.0
 PyJWT==1.6.1
+PyMySQL==0.7.6
 python-keystoneclient==3.8.0
 python-memcached==1.56;python_version=='2.7'
 python-memcached==1.58;python_version>='3.4'