diff --git a/vocoder/README.md b/vocoder/README.md
index 48fc24ee..1b65f929 100644
--- a/vocoder/README.md
+++ b/vocoder/README.md
@@ -32,4 +32,7 @@ You can fine-tune a pre-trained model by the following command.
 
 Restoring a model starts a new training in a different output folder. It only restores model weights with the given checkpoint file. However, continuing a training starts from the same conditions the previous training run left off.
 
-You can also follow your training runs on Tensorboard as you do with our TTS models.
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+You can also follow your training runs on Tensorboard as you do with our TTS models.
+
+## Acknowledgement
+Thanks to @kan-bayashi for his [repository](https://github.com/kan-bayashi/ParallelWaveGAN) being the start point of our work.
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