diff --git a/tox.ini b/tox.ini
index 95dc08f..de7da91 100644
--- a/tox.ini
+++ b/tox.ini
@@ -17,7 +17,7 @@ commands = {posargs}
 [testenv:docs]
 basepython = python3
 deps =
-    -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
+    -c{env:UPPER_CONSTRAINTS_FILE:https://opendev.org/openstack/requirements/raw/branch/master/upper-constraints.txt}
     -r{toxinidir}/requirements.txt
 commands = sphinx-build -W -E -b html -d doc/build/doctrees doc/source doc/build/html