diff --git a/requirements-py3.txt b/requirements-py3.txt
index c979d67a..93ce70c2 100644
--- a/requirements-py3.txt
+++ b/requirements-py3.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.
+
 alembic>=0.6.4
 anyjson>=0.3.3
 argparse
diff --git a/requirements.txt b/requirements.txt
index 0a8f9ac7..aef8156a 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.
+
 alembic>=0.6.4
 anyjson>=0.3.3
 argparse
diff --git a/test-requirements-py3.txt b/test-requirements-py3.txt
index 2ef7498c..766b9b8d 100644
--- a/test-requirements-py3.txt
+++ b/test-requirements-py3.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.
+
 # Hacking already pins down pep8, pyflakes and flake8
 hacking>=0.9.2,<0.10
 Babel>=1.3
diff --git a/test-requirements.txt b/test-requirements.txt
index 27d39cdd..3cb82f7c 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.
+
 # Hacking already pins down pep8, pyflakes and flake8
 hacking>=0.9.2,<0.10
 Babel>=1.3