diff --git a/tox.ini b/tox.ini
index 1ae6de65..fab08511 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,7 +6,7 @@ envlist = py38,py39,pep8
 setenv =
     PYTHON=coverage run --source barbicanclient --parallel-mode
 deps =
-    -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+    -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/2023.2}
     -r{toxinidir}/requirements.txt
     -r{toxinidir}/test-requirements.txt
 commands =
@@ -35,7 +35,7 @@ commands = {posargs}
 # the main docs to https://docs.openstack.org/python-barbicanclient
 description = Build main documentation
 deps =
-    -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+    -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/2023.2}
     -r{toxinidir}/requirements.txt
     -r{toxinidir}/doc/requirements.txt
 commands=