diff --git a/requirements.txt b/requirements.txt
index d1fff57e9..dcd367ba5 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
 alembic>=0.9.8  # MIT
 cachetools>=2.0.1 # MIT License