diff --git a/requirements.txt b/requirements.txt
index a45b25fe..5c3715d5 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.
+
 pbr>=5.5.0 # Apache-2.0
 python-heatclient>=1.10.0 # Apache-2.0