diff --git a/lib.sh b/lib.sh
index c46743b7..7a80124e 100644
--- a/lib.sh
+++ b/lib.sh
@@ -178,6 +178,7 @@ fulltextsearch_install() {
     FULLTEXTSEARCH_IMAGE_NAME=fulltextsearch_es01
     FULLTEXTSEARCH_SERVICE=nextcloud-fulltext-elasticsearch-worker.service
     # Supports 0-9.0-99.0-9. Max supprted version with this function is 9.99.9. When ES 10.0.0 is out we have a problem.
+    # Maybe "10\\.[[:digit:]][[:digit:]]\\.[[:digit:]]" will work?
     FULLTEXTSEARCH_IMAGE_NAME_LATEST_TAG="$(curl -s -m 900 https://www.docker.elastic.co/r/elasticsearch | grep -Eo "[[:digit:]]\\.[[:digit:]][[:digit:]]\\.[[:digit:]]" | sort --version-sort | tail -1)"
     # Legacy, changed 2023-09-21
     DOCKER_IMAGE_NAME=es01