diff --git a/es-monitoring/README.md b/es-monitoring/README.md
index 685d4da..f6740dd 100644
--- a/es-monitoring/README.md
+++ b/es-monitoring/README.md
@@ -53,6 +53,8 @@ es-monitoring -operation es-index-records-count -index-name filebeat -timerange
 
 ```
 Usage of ./es-monitor:
+  -exclude-index string
+    	Elasticsearch index name comma-separated list for exluded, (like "filebeat,mailindex,e.t.c") (default ".")
   -indexname string
         Elasticsearch index name pattern, (like "filebeat")
   -operation string