diff --git a/README.md b/README.md
index 86e7e03..41c836c 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,8 @@
 Convert LabelMe Annotation Tool JSON format to YOLO text file format.
 
 How to use:
+Input LabelMe JSON folder as parameter for --json_dir, and define validation dataset size as parameter for --val_size.
+Run python by below command.
 ```bash
 python labelme2yolo.py --json_dir /home/username/labelme_json_dir/ --val_size 0.2
 ```