diff --git a/README.md b/README.md
index ca3b79a..46616a9 100644
--- a/README.md
+++ b/README.md
@@ -33,4 +33,5 @@ $ GOOS=linux GOARCH=amd64 go build -o backup git.lhk.o-r.kr/freerer2/simple_back
   backup /source /simple_backup --group-by day --compare hash
   backup /home/user/docs /simple_backup/docs -i -v
   backup /data /simple_backup -d --force
+  backup /data /simple_backup -i -g sec -c hash -v
 ```
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