diff --git a/config/env.example.optional b/config/env.example.optional
index 63d32c047..a3f47d43f 100644
--- a/config/env.example.optional
+++ b/config/env.example.optional
@@ -168,3 +168,10 @@ SIB_WEBHOOK_URL=""
 
 # ServicesPublics+ tracking url shown to user when dossier is terminated.
 SERVICES_PUBLICS_PLUS_URL=""
+
+# Elasticsearch APM
+# send application logs to elasticsearch APM component via elastic-apm gem
+# see https://www.elastic.co/guide/en/apm/agent/ruby/current/configuration.html for more configuration options and vars
+ELASTIC_APM_ENABLED=""	# disabled by default, set to "true" to enable
+ELASTIC_APM_SERVER_URL="http://192.168.0.1:8200" # elasticsearch APM endpoint URL
+