diff --git a/requirements.txt b/requirements.txt
index 3943b9c44..784bc45cf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,7 @@
+# Requirements lower bounds listed here are our best effort to keep them up to
+# date but we do not test them so no guarantee of having them all correct. If
+# you find any incorrect lower bounds, let us know or propose a fix.
+
 # See: https://bugs.launchpad.net/pbr/+bug/1384919 for why this is here...
 pbr>=2.0.0 # Apache-2.0