How to use this Vocoder with your Tacotron?

[gheyret]

Thank you for your work.
I used your Tacotron in your Universal Vocoding.The quality of the speech is excellent. However, the inference speed is slow.
for that reason, I would like to use this hifigan as a vocoder.
But Tacotron's n_mel is 80, while hifigan's n_mel is 128.
How to use hifigan with Tacotron?