diff --git a/doc/requirements.txt b/doc/requirements.txt
new file mode 100644
index 0000000..1489bce
--- /dev/null
+++ b/doc/requirements.txt
@@ -0,0 +1,3 @@
+sphinx>=2.0.0,!=2.1.0 # BSD
+openstackdocstheme>=2.2.1 # Apache-2.0
+reno>=3.1.0 # Apache-2.0
diff --git a/requirements.txt b/requirements.txt
index f40b1ba..ebd9838 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,7 +12,7 @@ oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
 oslo.utils>=3.33.0 # Apache-2.0
 os-client-config>=1.28.0 # Apache-2.0
 osc-lib>=1.14.0 # Apache-2.0
-PrettyTable<0.8,>=0.7.1 # BSD
+PrettyTable>=0.7.1 # BSD
 cryptography>=2.7 # BSD/Apache-2.0
 decorator>=3.4.0 # BSD
 openstacksdk>=0.42.0 # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index ebe8b92..ba39f5c 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -6,11 +6,7 @@ hacking>=3.0.1,<3.1.0 # Apache-2.0
 
 coverage>=4.0,!=4.4 # Apache-2.0
 python-subunit>=0.0.18 # Apache-2.0/BSD
-sphinx>=2.0.0,!=2.1.0 # BSD
 oslotest>=3.2.0 # Apache-2.0
 stestr>=2.2.0 # Apache-2.0
 testtools>=2.4.0 # MIT
-openstackdocstheme>=2.2.1 # Apache-2.0
 requests-mock>=0.6.0  # Apache-2.0
-# releasenotes
-reno>=3.1.0 # Apache-2.0
diff --git a/tox.ini b/tox.ini
index aa685ea..d72dd8b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -36,9 +36,12 @@ commands =
     coverage xml -o cover/coverage.xml
 
 [testenv:docs]
+deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
+       -r{toxinidir}/doc/requirements.txt
 commands = sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:releasenotes]
+deps = {[testenv:docs]deps}
 commands =
   sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html