diff --git a/docs/index.rst b/docs/index.rst
index 22b8feed..72ae0f65 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -390,7 +390,7 @@ To set up visual dashboards of DMARC data, install Elasticsearch and Kibana.
     wget -qO - https://artifacts.elastic.co/GPG-KEY-elasticsearch | sudo apt-key add -
     echo "deb https://artifacts.elastic.co/packages/6.x/apt stable main" | sudo tee -a /etc/apt/sources.list.d/elastic-6.x.list
     sudo apt-get update
-    sudo apt-get install -y elasticsearch kibana
+    sudo apt-get install -y default-jre-headless elasticsearch kibana
     sudo systemctl daemon-reload
     sudo systemctl enable elasticsearch.service
     sudo systemctl enable kibana.service