diff --git a/global-requirements.txt b/global-requirements.txt
index 3a003ae0ad..673978a0ef 100644
--- a/global-requirements.txt
+++ b/global-requirements.txt
@@ -320,6 +320,7 @@ pysqlite;python_version=='2.7'  # zlib/libpng
 python-consul>=0.4.7  # MIT License
 python-ldap>=2.4;python_version=='2.7'  # PSF
 python-subunit>=0.0.18  # Apache-2.0/BSD
+python-pytun>=2.2.1 # MIT
 pyzmq>=14.3.1 # LGPL+BSD
 redis>=2.10.0  # MIT
 requests-mock>=0.7.0  # Apache-2.0
diff --git a/upper-constraints.txt b/upper-constraints.txt
index a1fce8e1ea..7b3354e997 100644
--- a/upper-constraints.txt
+++ b/upper-constraints.txt
@@ -295,6 +295,7 @@ python-muranoclient===0.8.2
 python-neutronclient===4.0.0
 python-novaclient===3.2.0
 python-openstackclient===2.1.0
+python-pytun===2.2.1
 python-qpid-proton===0.10
 python-saharaclient===0.12.0
 python-senlinclient===0.3.0