diff --git a/tox.ini b/tox.ini
index 33ff8bcfc2e..59d7db64dfa 100644
--- a/tox.ini
+++ b/tox.ini
@@ -133,7 +133,6 @@ envdir = {toxworkdir}/docs
 deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/doc/requirements.txt
-  -r{toxinidir}/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:pdf-docs]