diff --git a/README.md b/README.md
index d04919d..69bcf5b 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ Steps
 * run `python3 main.py`
   * required `--input <dir of input json>`
   * required `--output <dir of output csvs>`
-  * (optional) to merge all json to single csv `--single`
+  * (optional) to merge all json to single csv `--single`, default is one set of csv files for one json
   * (optional) # of records to check records for all headers `--metadata <number or records>` defaults to 1000
   * required `--join-column <column name from first level to use as merge column>`
   * required `--name <base-name of data>`