diff --git a/tox.ini b/tox.ini
index 9f2694ff..4598a5ed 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,7 +17,7 @@ passenv =
     no_proxy
     NO_PROXY
 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 = python setup.py test --slowest --testr-args='{posargs}'
@@ -33,7 +33,7 @@ commands = python setup.py test --coverage --coverage-package-name=translator --
 
 [testenv:docs]
 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}/doc/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html