diff --git a/README.md b/README.md
index ef22fd5..88358ad 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 ```
 pip install --break-system-packages pygame mido python-rtmidi
-python3 midi_piano_viz.py
+python3 piano-visualizer.py
 ```
 
 就這樣！
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