diff --git a/docs/requirements-docs.txt b/docs/requirements-docs.txt
index 0680dad..3b3441a 100644
--- a/docs/requirements-docs.txt
+++ b/docs/requirements-docs.txt
@@ -1,16 +1,3 @@
-tox
-Sphinx>=2,<4
-doc8
-docutils
-setuptools
-six
-sphinx_rtd_theme>=0.4.3
-sphinxcontrib-blockdiag
-sphinxcontrib-needs>=0.2.3
-sphinxcontrib-nwdiag
-sphinxcontrib-seqdiag
-sphinxcontrib-swaggerdoc
-sphinxcontrib-plantuml
-sphinx_bootstrap_theme
 lfdocs-conf
-sphinx-tabs
\ No newline at end of file
+sphinx>=4.2.0  # BSD
+sphinx-rtd-theme>=1.0.0  # MIT
diff --git a/docs/tox.ini b/docs/tox.ini
index edac8c3..884c455 100644
--- a/docs/tox.ini
+++ b/docs/tox.ini
@@ -5,7 +5,10 @@
 
 [testenv:docs]
 basepython = python3
-deps = -r{toxinidir}/requirements-docs.txt
+deps =
+    -r{toxinidir}/requirements-docs.txt
+    -chttps://git.onap.org/doc/plain/etc/upper-constraints.os.txt
+    -chttps://git.onap.org/doc/plain/etc/upper-constraints.onap.txt
 commands =
     sphinx-build -b html -n -d {envtmpdir}/doctrees ./ {toxinidir}/_build/html
     echo "Generated docs available in {toxinidir}/_build/html"
@@ -16,7 +19,10 @@
 
 [testenv:docs-linkcheck]
 basepython = python3
-#deps = -r{toxinidir}/requirements-docs.txt
+deps =
+    -r{toxinidir}/requirements-docs.txt
+    -chttps://git.onap.org/doc/plain/etc/upper-constraints.os.txt
+    -chttps://git.onap.org/doc/plain/etc/upper-constraints.onap.txt
 commands = echo "Link Checking not enforced"
 #commands = sphinx-build -b linkcheck -d {envtmpdir}/doctrees ./ {toxinidir}/_build/linkcheck
 whitelist_externals = echo