diff --git a/doc/requirements.txt b/doc/requirements.txt
index 57674ca4..87c778e2 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,10 +1,6 @@
-# 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.
-
 # For generating sphinx documentation
 openstackdocstheme>=2.2.0 # Apache-2.0
-sphinx>=2.0.0,!=2.1.0 # BSD
+sphinx>=2.0.0 # BSD
 reno>=3.1.0 # Apache-2.0
 sphinxcontrib-apidoc>=0.2.0  # BSD
 
diff --git a/setup.cfg b/setup.cfg
index b0329148..c11aab91 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -42,6 +42,6 @@ dogpile =
   python-binary-memcached>=0.29.0 # MIT
   redis>=3.0.0 # MIT
 mongo =
-  pymongo!=3.1,>=3.0.2 # Apache-2.0
+  pymongo>=3.0.2 # Apache-2.0
 etcd3gw =
   etcd3gw>=0.2.0 # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index e60f7078..66e83a51 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -4,6 +4,6 @@ stestr>=2.0.0 # Apache-2.0
 pymemcache>=3.5.0 # Apache-2.0
 python-binary-memcached>=0.29.0 # MIT
 python-memcached>=1.56 # PSF
-pymongo!=3.1,>=3.0.2 # Apache-2.0
+pymongo>=3.0.2 # Apache-2.0
 etcd3gw>=0.2.0 # Apache-2.0
 redis>=3.0.0 # MIT