diff --git a/requirements.txt b/requirements.txt
index ef8fff1b..8b42717e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,8 @@
+# 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
-requests>=1.1
+requests>=1.2.1,!=2.4.0
 six>=1.7.0
 stevedore>=0.14
 jsonschema>=2.0.0,<3.0.0
diff --git a/test-requirements.txt b/test-requirements.txt
index bd5c683b..dc01e75b 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,3 +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.
 # Hacking already pins down pep8, pyflakes and flake8
 hacking>=0.8.0,<0.9
 # Unit testing