diff --git a/tox.ini b/tox.ini
index 4ff344a9..36a6f50d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -9,7 +9,7 @@ usedevelop = True
 install_command = pip install {opts} {packages}
 setenv =
    VIRTUAL_ENV={envdir}
-deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/2025.1}
        -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 allowlist_externals = bash
@@ -29,7 +29,7 @@ commands = /bin/bash run_tests.sh -N --integration --selenium-headless {posargs}
 commands = python setup.py testr --coverage --testr-args={posargs}
 
 [testenv:docs]
-deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/2025.1}
        -r{toxinidir}/doc/requirements.txt
 commands =
   sphinx-build -a -E -W -b html doc/source doc/build/html