diff --git a/README.md b/README.md
index 625b950..f05dbd4 100644
--- a/README.md
+++ b/README.md
@@ -3,9 +3,9 @@ Map generation
**Requirements**: Python 2.7.
- python mapper.py -i <input OSM XML file name> -o <output SVG file name>
+ python mapper.py -i -o