diff --git a/py2-constraints.txt b/py2-constraints.txt
index ac7c3e8816..40a5e5d860 100644
--- a/py2-constraints.txt
+++ b/py2-constraints.txt
@@ -77,4 +77,5 @@ python-keystoneclient===3.22.0
 dnspython===1.16.0
 setuptools===44.1.1
 pycadf===2.10.0
+smmap===3.0.5
 PasteDeploy==2.1.1