diff --git a/examples/excel2json/README.md b/examples/excel2json/README.md
index 5ede762..cde5853 100644
--- a/examples/excel2json/README.md
+++ b/examples/excel2json/README.md
@@ -23,9 +23,9 @@ docker run -v /home/sombochea/excel2json:/app/data -e APP_NAME="EXCEL 2 JSON" -e
 # Environment
 ```env
 APP_NAME=custom app name
-INPUT_FILE=./data/mydata.json
+INPUT_FILE=./data/mydata.xlsx
 OUTPUT_PATH=./data/outputs
 MAPPER_FILE=./data/mapper.json
 SHEET_NAME=Sheet1
 ENCODING=utf-8
-```
\ No newline at end of file
+```