diff --git a/README.md b/README.md
index ace40ca..656e2e5 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Written in Haskell.
 # Cabal Commands
 run main
 ```
-cabal run
+cabal run compiler <FILENAME>
 ```
 
 run tests