diff --git a/README.md b/README.md
index 3c26d37..060e486 100644
--- a/README.md
+++ b/README.md
@@ -64,7 +64,7 @@
 
 ### Usage
 
-`python3 compose-viz.py [option] [input-file]`
+`python3 compose-viz.py [OPTIONS] [input-file]`
 
 ### Options