diff --git a/README.md b/README.md
index 10b7fe5..d5866ab 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,7 @@ COMMANDS:
 
 GLOBAL OPTIONS:
    --url value    source url to parse [$URL_PARSER_URL]
+   --stdin        read url to parse from stdin (default: false) [$URL_PARSER_STDIN]
    --help, -h     show help
    --version, -v  print the version
 ```