diff --git a/doc/requirements.txt b/doc/requirements.txt
index bfd603edf..e65f0fc56 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,4 +1,4 @@
-sphinx>=2.0.0,!=2.1.0,<=4.2.0
+sphinx==4.2.0
 openstackdocstheme>=2.2.1,<=2.3.1 # Apache-2.0
 
 # API Reference Guide
diff --git a/tox.ini b/tox.ini
index 6883a1845..842f3ff70 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,7 +13,7 @@ deps = -r{toxinidir}/test-requirements.txt
 
 [testenv:docs]
 deps =
-  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+#  -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
   -r{toxinidir}/doc/requirements.txt
 commands =
   sphinx-build -a -E -W --keep-going -d doc/build/doctrees -t starlingx -t openstack -b html doc/source doc/build/html {posargs}