Custom icons are not rendered after upgrading to Vuetify 2

I had a Vue 2, Nuxt 2 application and after upgrading to Vuetify 2 I am not able to display custom icons.

Here there is my setup:

nuxt.config.js

css: [
  "~/assets/styles/icons.css",
]

plugins/vuetify.js

import '../assets/styles/icons.css'

MyComponent.vue

<v-icon>icons icon-arrow-down</v-icon>