diff --git a/.gitreview b/.gitreview
index 6cf44857..9b559e64 100644
--- a/.gitreview
+++ b/.gitreview
@@ -2,3 +2,4 @@
 host=review.opendev.org
 port=29418
 project=openstack/python-swiftclient.git
+defaultbranch=unmaintained/2023.1
diff --git a/tox.ini b/tox.ini
index 3a6cd8a0..db593acd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -54,7 +54,7 @@ commands =
 
 [testenv:docs]
 usedevelop = False
-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/2023.1}
        -r{toxinidir}/doc/requirements.txt
 commands=
     sphinx-build -W -b html doc/source doc/build/html -W
@@ -87,7 +87,7 @@ commands = bindep test
 
 [testenv:releasenotes]
 usedevelop = False
-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/2023.1}
        -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -W -E -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html