diff --git a/doc/requirements.txt b/doc/requirements.txt
new file mode 100644
index 00000000..5821c3bf
--- /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>=2.0.0,!=2.1.0 # BSD
+openstackdocstheme>=2.2.1 # Apache-2.0
+
+# releasenotes
+reno>=3.1.0 # Apache-2.0
+
+oslo.config>=6.8.0 # Apache-2.0
diff --git a/lower-constraints.txt b/lower-constraints.txt
index 38ae4691..59da5f43 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -1,59 +1,23 @@
-alabaster==0.7.10
-appdirs==1.3.0
 coverage==4.0
-ddt==1.0.1
-debtcollector==1.2.0
-docutils==0.11
-dulwich==0.15.0
+ddt==1.2.1
+debtcollector==1.19.0
 eventlet==0.22.0
-extras==1.0.0
-fasteners==0.7.0
-fixtures==3.0.0
-greenlet==0.4.15
-imagesize==0.7.1
-iso8601==0.1.11
-Jinja2==2.10
-keystoneauth1==3.4.0
-linecache2==1.0.0
-MarkupSafe==1.1.1
-mccabe==0.2.1
-mox3==0.20.0
-msgpack-python==0.4.0
 netaddr==0.7.18
-netifaces==0.10.4
 openstackdocstheme==2.2.1
-os-client-config==1.28.0
-oslo.concurrency==3.26.0
-oslo.config==5.2.0
-oslo.context==2.19.2
+oslo.concurrency==3.29.0
+oslo.config==6.8.0
+oslo.context==2.22.2
 oslo.i18n==3.15.3
 oslo.log==3.36.0
-oslo.serialization==2.18.0
-oslo.utils==3.33.0
-oslotest==3.2.0
+oslo.serialization==2.21.1
+oslo.utils==4.7.0
+oslotest==3.8.0
 pbr==2.0.0
-Pygments==2.2.0
-pyinotify==0.9.6
 PyMI==1.0.0;sys_platform=='win32'
-pyparsing==2.1.0
-python-dateutil==2.5.3
-python-mimeparse==1.6.0
-python-subunit==1.0.0
-pytz==2013.6
-PyYAML==3.13
-reno==3.1.0
-requests==2.14.2
-requestsexceptions==1.2.0
-rfc3986==0.3.1
-six==1.10.0
-snowballstemmer==1.2.1
-Sphinx==2.0.0
-sphinxcontrib-websupport==1.0.1
+six==1.12.0
 stestr===2.0.0
 stevedore==1.20.0
 testscenarios==0.4
 testtools==2.2.0
-traceback2==1.4.0
-unittest2==1.1.0
 wmi==0.5;sys_platform=='win32'
 wrapt==1.7.0
diff --git a/requirements.txt b/requirements.txt
index 18a5284b..c28a94da 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,10 +5,10 @@
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 
 eventlet>=0.22.0 # MIT
-oslo.concurrency>=3.26.0 # Apache-2.0
-oslo.config>=5.2.0 # Apache-2.0
+oslo.concurrency>=3.29.0 # Apache-2.0
+oslo.config>=6.8.0 # Apache-2.0
 oslo.log>=3.36.0 # Apache-2.0
-oslo.utils>=3.33.0 # Apache-2.0
+oslo.utils>=4.7.0 # Apache-2.0
 oslo.i18n>=3.15.3 # Apache-2.0
 
 # Windows-only requirements
diff --git a/test-requirements.txt b/test-requirements.txt
index dc8f2513..67ad72c5 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,14 +5,8 @@
 hacking>=3.0.1,<3.1.0 # Apache-2.0
 
 coverage!=4.4,>=4.0 # Apache-2.0
-ddt>=1.0.1 # MIT
-docutils>=0.11 # OSI-Approved Open Source, Public Domain
-sphinx>=2.0.0,!=2.1.0 # BSD
-oslo.config>=5.2.0 # Apache-2.0
-oslotest>=3.2.0 # Apache-2.0
+ddt>=1.2.1 # MIT
+oslotest>=3.8.0 # Apache-2.0
 stestr>=2.0.0 # Apache-2.0
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
-openstackdocstheme>=2.2.1 # Apache-2.0
-# releasenotes
-reno>=3.1.0 # Apache-2.0
diff --git a/tox.ini b/tox.ini
index 71fd54cb..ca322763 100644
--- a/tox.ini
+++ b/tox.ini
@@ -22,6 +22,7 @@ commands = {posargs}
 commands = python setup.py test --coverage --testr-args='{posargs}'
 
 [testenv:docs]
+deps = -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:releasenotes]