diff --git a/README.md b/README.md
index 81c80b5..61f0104 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,11 @@ You can use via Facade like so:
 ```php
 PdfPasswordProtect::encrypt(storage_path('pdf/document.pdf'),storage_path('pdf/'.'encrypted-documented.pdf'),'janedoe');
 ```
+Encrypt method in detail
+* $inputFile and $outputFile has to be a path like `storage_path("pdf/document.pdf")`
+```
+PdfPasswordProtect::encrypt($inputFile,outputFile,$password)
+```
 
 The final file will be located in `storage/pdf` as `encrypted-document.pdf`