diff --git a/doc/requirements.txt b/doc/requirements.txt
index 1489bce..10d3b9f 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,3 +1,3 @@
-sphinx>=2.0.0,!=2.1.0 # BSD
+sphinx>=2.1.1 # BSD
 openstackdocstheme>=2.2.1 # Apache-2.0
 reno>=3.1.0 # Apache-2.0
diff --git a/requirements.txt b/requirements.txt
index 07153c5..8b91f88 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,11 +1,7 @@
-# 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.
-
 oslo.config>=3.9.0 # Apache-2.0
 oslo.messaging>=5.2.0 # Apache-2.0
 oslo.utils>=4.7.0 # Apache-2.0
 pbr>=1.6 # Apache-2.0
-pycadf!=2.0.0,>=1.1.0 # Apache-2.0
+pycadf>=2.0.1 # Apache-2.0
 keystoneauth1>=2.18.0  # Apache-2.0
 python-keystoneclient>=3.8.0  # Apache-2.0