diff --git a/doc/requirements.txt b/doc/requirements.txt
new file mode 100644
index 0000000..3dc6a0f
--- /dev/null
+++ b/doc/requirements.txt
@@ -0,0 +1,11 @@
+# The order of packages is significant, because pip processes them in the order
+# of appearance. Changing the order has an impact on the overall integration
+# process, which may cause wedges in the gate later.
+sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
+sphinxcontrib-apidoc>=0.2.0  # BSD
+openstackdocstheme>=1.18.1 # Apache-2.0
+reno>=2.5.0 # Apache-2.0
+mock>=2.0.0 # BSD
+ddt>=1.0.1 # MIT
+testtools>=2.2.0 # MIT
+tempest>=17.1.0 # Apache-2.0
diff --git a/tox.ini b/tox.ini
index 1285095..f255b83 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,6 +19,7 @@ commands = {posargs}
 
 [testenv:docs]
 basepython = python3
+deps = -r{toxinidir}/doc/requirements.txt
 commands =
   find . -type f -name "*.pyc" -delete
   python setup.py build_sphinx