diff --git a/requirements.txt b/requirements.txt
index 2249fb2240..9f752526df 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.
+
 alembic>=1.8.0
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 eventlet>=0.27.0 # MIT