diff --git a/loki-server/data/grafana/backup-tool.sh b/loki-server/data/grafana/backup-tool.sh
index d8bf902..74bf26c 100755
--- a/loki-server/data/grafana/backup-tool.sh
+++ b/loki-server/data/grafana/backup-tool.sh
@@ -1,5 +1,7 @@
 #!/bin/bash
 
+# readme from https://hub.docker.com/r/ysde/docker-grafana-backup-tool
+
 docker run --user $(id -u):$(id -g) --rm --name grafana-backup-tool \
            -v $pwd/backup/:/opt/grafana-backup-tool/_OUTPUT_ \
 					 --env-file .env \