diff --git a/subjects/paramrange/README.md b/subjects/paramrange/README.md
index c1565e92..72cc838b 100644
--- a/subjects/paramrange/README.md
+++ b/subjects/paramrange/README.md
@@ -13,7 +13,7 @@ $ go run . | cat -e
 $
 $ go run . 1 2 3 4 5 6 7 8 9 | cat -e
 1 9$
-$ go run . -1 1 | cat -e
+$ go run . "-1" "1" | cat -e
 -1 1$
 $ go run . 1 a 2 3 4 5 6 7 8 9 | cat -e
 Error$