diff --git a/HowtoElasticsearch.md b/HowtoElasticsearch.md
index 64198865..ccf36e96 100644
--- a/HowtoElasticsearch.md
+++ b/HowtoElasticsearch.md
@@ -16,6 +16,7 @@ Vu le développement actif d'Elasticsearch, nous préconisons l'installation des
 # apt install apt-transport-https
 # echo "deb https://artifacts.elastic.co/packages/5.x/apt stable main" >> /etc/apt/sources.list.d/elastic.list
 # wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -
+# apt update
 # apt install elasticsearch
 ~~~