diff --git a/04-using-3rd-party-containers/README.md b/04-using-3rd-party-containers/README.md
index c9451d29..7a629ff4 100644
--- a/04-using-3rd-party-containers/README.md
+++ b/04-using-3rd-party-containers/README.md
@@ -318,7 +318,7 @@ docker run -d --rm \
 https://hub.docker.com/_/elasticsearch
 ```bash
 docker run -d --rm \
-  -v elasticsearchdata:/usr/share/elasticsearch/data
+  -v elasticsearchdata:/usr/share/elasticsearch/data \
   -e ELASTIC_PASSWORD=foobarbaz \
   -e "discovery.type=single-node" \
   -p 9200:9200 \