diff --git a/README.md b/README.md
index 12917fc..be847a0 100644
--- a/README.md
+++ b/README.md
@@ -71,6 +71,7 @@ interact with the Docker daemon.*
 
 By default, the stack exposes the following ports:
 * 5000: Logstash TCP input
+* 9600: Logstash monitoring API
 * 9200: Elasticsearch HTTP
 * 9300: Elasticsearch TCP transport
 * 5601: Kibana