diff --git a/README.md b/README.md
index 6a747b5..8d33da8 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,12 @@ echo "module.exports = {
 
 You can optionnally install translation dependencies of[inventaire-i18n](https://github.com/inventaire/inventaire-i18n/) [need more details]
 
+### Troubleshooting
+#### elasticsearch errors
+- `max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]`: fix by running the command `sudo sysctl -w vm.max_map_count=262144` on your host machine
+
+See also [Elasticsearch with Docker](https://www.elastic.co/guide/en/elasticsearch/reference/7.9/docker.html)
+
 ## Usage
 
 ```bash
diff --git a/docker-compose.yml b/docker-compose.yml
index a3e53f2..ec56dfb 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -24,10 +24,12 @@ services:
     network_mode: host
     tty: true
   elasticsearch:
-    image: elasticsearch:2.4
+    image: elasticsearch:7.9.1
     environment:
       - 'http.host=0.0.0.0'
       - 'transport.host=127.0.0.1'
+      # See https://www.elastic.co/guide/en/elasticsearch/reference/7.9/docker.html
+      - 'discovery.type=single-node'
     ports :
       - '127.0.0.1:9200:9200'
     volumes: