diff --git a/tox.ini b/tox.ini
index 4b628de..9d95f54 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,7 +8,7 @@ usedevelop = True
 install_command = pip install {opts} {packages}
 setenv = VIRTUAL_ENV={envdir}
 deps =
-       -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/plain/upper-constraints.txt}
+       -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 whitelist_externals = find
@@ -20,7 +20,7 @@ commands =
 [testenv:pypy]
 basepython = python3
 deps =
-       -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/plain/upper-constraints.txt}
+       -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
  setuptools<3.2
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
@@ -51,7 +51,7 @@ commands = oslo_debug_helper -t solumclient/tests {posargs}
 [testenv:docs]
 basepython = python3
 deps =
-       -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/plain/upper-constraints.txt}
+       -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -b html doc/source doc/build/html