diff --git a/tox.ini b/tox.ini
index 23069cc8d..e7671866d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -102,7 +102,7 @@ usedevelop = False
 [testenv:docs]
 allowlist_externals =
   sphinx-build
-deps = -c{env:TOX_CONSTRAINTS_FILE:{toxinidir}/upper-constraints.txt}
+deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/2025.1}
        -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html