diff --git a/README.md b/README.md
index 56ca792..5b1b434 100644
--- a/README.md
+++ b/README.md
@@ -13,3 +13,5 @@ Command line options:
 -greenstone (true/false) For export with html comments that virtually divide document on headings, markup useful for import into Greenstone 3 digital library.
 
 -css_inline (true/false) If you are going to import html document on a web site it is better to use inline styles.
+
+-csv_metadata path_to_csv_file with metadata for RDF export