diff --git a/scripts/build_and_push.sh b/scripts/build_and_push.sh
index ecc5fae..83f67a3 100644
--- a/scripts/build_and_push.sh
+++ b/scripts/build_and_push.sh
@@ -49,7 +49,8 @@ for name in "${submodules[@]}"; do
   fi
 
   image_name=$(basename "${path}")
-  full_ref="${REGISTRY}/${NAMESPACE}/${image_name}:${DOCKER_TAG}"
+  image_name_lc=$(printf "%s" "${image_name}" | tr '[:upper:]' '[:lower:]')
+  full_ref="${REGISTRY}/${NAMESPACE}/${image_name_lc}:${DOCKER_TAG}"
 
   if [ ! -d "${path}" ]; then
     echo "[docker][warn] sous-dossier ${path} manquant, on saute" >&2
@@ -69,9 +70,9 @@ for name in "${submodules[@]}"; do
     if [ "${rel_dir}" = "${df_dir}" ]; then rel_dir=""; fi
     suffix=""
     if [ -n "${rel_dir}" ]; then
-      suffix="-$(echo "${rel_dir}" | tr '/' '-')"
+      suffix="-$(echo "${rel_dir}" | tr '[:upper:]' '[:lower:]' | tr '/' '-')"
     fi
-    image_name_variant="${image_name}${suffix}"
+    image_name_variant="${image_name_lc}${suffix}"
     full_ref_variant="${REGISTRY}/${NAMESPACE}/${image_name_variant}:${DOCKER_TAG}"
 
     log_file="${LOG_DIR}/${image_name_variant}.log"