diff --git a/requirements.txt b/requirements.txt
index ae2f7e8..c065d73 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,2 @@
-# 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>=2.0 # Apache-2.0
 python-pcre
diff --git a/test-requirements.txt b/test-requirements.txt
index e1c486c..60c3d9f 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,4 +1,4 @@
-hacking>=3.0.1,<3.1.0 # Apache-2.0
+hacking>=6.1.0,<6.2.0 # Apache-2.0
 coverage>=4.0,!=4.4 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0
 testtools>=1.4.0 # MIT