diff --git a/tox.ini b/tox.ini
index 01829014..b805a444 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,7 +12,7 @@ setenv =
    PYTHON=coverage run --source barbicanclient --parallel-mode
    VIRTUAL_ENV={envdir}
 deps =
-       -c{env:TOX_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
+       -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt