diff --git a/requirements.txt b/requirements.txt
index c3dd43c..8a18faa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,13 +1,16 @@
+# 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.
 pbr>=0.6,!=0.7,<1.0
 
 anyjson>=0.3.3
 argparse
 eventlet>=0.15.1
-python-keystoneclient>=0.10.0
+python-keystoneclient>=0.11.1
 python-heatclient>=0.2.9
-requests>=1.2.1
+requests>=2.2.0,!=2.4.0
 iso8601>=0.1.9
 lxml>=2.3
-oslo.config>=1.4.0.0a3
+oslo.config>=1.4.0  # Apache-2.0
 six>=1.7.0
 dogpile.cache>=0.5.3
diff --git a/test-requirements.txt b/test-requirements.txt
index bda95b0..964f041 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,10 +1,13 @@
+# 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.
 coverage>=3.6
 discover
 fixtures>=0.3.14
 hacking>=0.8.0,<0.9
 mock>=1.0
 python-subunit>=0.0.18
-sphinx>=1.1.2,!=1.2.0,<1.3
+sphinx>=1.1.2,!=1.2.0,!=1.3b1,<1.3
 testrepository>=0.0.18
 testscenarios>=0.4
 testtools>=0.9.34