diff --git a/tox.ini b/tox.ini
index e1e679d2..e8339026 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/zed}
        -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/zed}
        -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -a -W -E -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html