diff --git a/tox.ini b/tox.ini
index 0bc9a44..9f45a5e 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,7 +12,7 @@ setenv =
     VIRTUAL_ENV = {envdir}
     PYTHONWARNINGS = default::DeprecationWarning
 deps =
-    -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt}
+    -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
     -r{toxinidir}/test-requirements.txt
     -r{toxinidir}/requirements.txt
 commands = stestr run {posargs}