diff --git a/tox.ini b/tox.ini
index 23f157fd9..08c0e381a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -15,7 +15,7 @@ setenv = VIRTUAL_ENV={envdir}
          OS_STDERR_CAPTURE=1
          PYTHONDONTWRITEBYTECODE=1
 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}/test-requirements.txt
 commands =
   stestr run {posargs}
@@ -33,7 +33,7 @@ commands = {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/2023.2}
        -r{toxinidir}/doc/requirements.txt
 allowlist_externals = rm
 commands =
@@ -50,7 +50,7 @@ commands =
 
 [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/2023.2}
        -r{toxinidir}/doc/requirements.txt
 allowlist_externals = rm
 commands =