diff --git a/doc/requirements.txt b/doc/requirements.txt
index 3c822d2..f22cc9f 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,2 +1,5 @@
+# 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>=1.6.2 # BSD
 openstackdocstheme>=1.17.0 # Apache-2.0
diff --git a/requirements.txt b/requirements.txt
index d8763a4..aa6cfb5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,9 +4,9 @@
 cliff!=2.9.0,>=2.8.0 # Apache-2.0
 jsonschema<3.0.0,>=2.6.0 # MIT
 osc-lib>=1.7.0 # Apache-2.0
-oslo.utils>=3.31.0 # Apache-2.0
+oslo.utils>=3.33.0 # Apache-2.0
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
-keystoneauth1>=3.2.0 # Apache-2.0
+keystoneauth1>=3.3.0 # Apache-2.0
 requests>=2.14.2 # Apache-2.0
 six>=1.10.0 # MIT
 stevedore>=1.20.0 # Apache-2.0
diff --git a/test-requirements.txt b/test-requirements.txt
index 795e6af..636efb5 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,7 +5,7 @@
 hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 coverage!=4.4,>=4.0 # Apache-2.0
 mock>=2.0.0 # BSD
-oslo.config>=4.6.0 # Apache-2.0
+oslo.config>=5.1.0 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0
 python-subunit>=1.0.0 # Apache-2.0/BSD
 requests-mock>=1.1.0 # Apache-2.0