diff --git a/demos/speech_recognition/README.md b/demos/speech_recognition/README.md
index 9fc7f088..3655691f 100644
--- a/demos/speech_recognition/README.md
+++ b/demos/speech_recognition/README.md
@@ -26,6 +26,8 @@ wget -c https://paddlespeech.bj.bcebos.com/PaddleAudio/zh.wav https://paddlespee
   ```bash
   paddlespeech asr --input ./zh.wav
   ```
+  (It doesn't matter if package `paddlespeech-ctcdecoders` is not found, the package is optional.)
+  
   Usage:
   ```bash
   paddlespeech asr --help