diff --git a/requirements.txt b/requirements.txt
index 72d4342c..7d658810 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +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.
+
 Babel>=1.3
 iso8601>=0.1.9
 netaddr>=0.7.6
diff --git a/test-requirements.txt b/test-requirements.txt
index 0237019f..83173e60 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,3 +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.
+
 coverage>=3.6
 discover
 fixtures>=0.3.14