diff --git a/tox.ini b/tox.ini
index a1e27a3d..ddf8b770 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,7 +19,7 @@ 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/2023.1}
     -r{toxinidir}/requirements.txt
     -r{toxinidir}/test-requirements.txt
 commands =
@@ -55,7 +55,7 @@ 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/2023.1}
     -r{toxinidir}/doc/requirements.txt
 commands =
     rm -rf doc/html doc/build
@@ -72,7 +72,7 @@ exclude=.venv,.git,.tox,dist,doc,*lib/python*,*egg,tools
 
 [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/2023.1}
     -r{toxinidir}/doc/requirements.txt
 commands =
   rm -rf releasenotes/build