diff --git a/source/user_guide/configure_image.rst b/source/user_guide/configure_image.rst
index 2027164cc77fee94fd6518146302d8100c0b99b9..6089125c32db207423f0c2bf46988f0230d73d49 100644
--- a/source/user_guide/configure_image.rst
+++ b/source/user_guide/configure_image.rst
@@ -111,6 +111,8 @@ The ``FROM ...`` indicate which base image should be used, the image contains:
    :file: image_list.csv
    :header-rows: 1
 
+If a version of R, Python, shiny-server, Debian or Ubuntu is missing do not hesitate to ask us to add it.
+
 Translation between ubuntu name and version can be found at https://wiki.ubuntu.com/Releases.
 Translation between debian name and version can be found at https://www.debian.org/releases/
 An up to date list can be found in https://gitlab.pasteur.fr/hub/shiny-k8s/container_registry