diff --git a/requirements.txt b/requirements.txt
index 4f0a0b2c72..7cbe2b1e60 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>=1.8.0 # MIT
 croniter>=0.3.4 # MIT License