diff --git a/requirements/app/cloud.txt b/requirements/app/cloud.txt
index acda01289da6f..ea55bed75af60 100644
--- a/requirements/app/cloud.txt
+++ b/requirements/app/cloud.txt
@@ -1,3 +1,5 @@
+# WARNING: this file is not used directly by the backend
+# any dependency here needs to be shipped with the base image
 redis>=4.0.1, <=4.2.4
 docker>=5.0.0, <=5.0.3
 s3fs>=2022.5.0, <2022.8.3