diff --git a/requirements.txt b/requirements.txt
index 25231aae0d..d5a2ebdf49 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>=3.1.1 # Apache-2.0
 defusedxml>=0.7.1 # PSF