diff --git a/tox.ini b/tox.ini
index 4e6e7dc3d4..5d6ad5ebbd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -25,7 +25,7 @@ whitelist_externals =
   bash
   find
 deps =
-  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/xena}
   -r{toxinidir}/test-requirements.txt
   -r{toxinidir}/requirements.txt
   # Unit test for a local hacking rule requires hacking.
@@ -138,7 +138,7 @@ commands =
 [testenv:docs]
 # We need to install horizon dependecies to build module references
 deps =
-  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/xena}
   -r{toxinidir}/requirements.txt
   -r{toxinidir}/doc/requirements.txt
 commands =