diff --git a/tox.ini b/tox.ini
index 4d5f2e4a..9044c9c8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -8,7 +8,7 @@ basepython = python3
 setenv = VIRTUAL_ENV={envdir}
 usedevelop = True
 deps =
-   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/2024.1}
    -r{toxinidir}/requirements.txt
    -r{toxinidir}/test-requirements.txt
 passenv = OS_TEST_*
@@ -16,13 +16,13 @@ commands = stestr run --slowest {posargs}
 
 [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/2024.1}
    -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:releasenotes]
 deps =
-   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+   -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/2024.1}
    -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -E -W -d releasenotes/build/.doctrees -b html releasenotes/source releasenotes/build/html