diff --git a/tox.ini b/tox.ini
index 0452abb1f65..94a1cfcd6f1 100644
--- a/tox.ini
+++ b/tox.ini
@@ -23,7 +23,7 @@ passenv = TRACE_FAILONLY
           TOX_ENV_SRC_MODULES
 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
   hacking>=6.1.0,<6.2.0 # Apache-2.0
@@ -151,7 +151,7 @@ commands = {posargs}
 # upper constraints will not be used for deps listed in requirements.txt
 # and may cause issues
 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
   -r{toxinidir}/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html