Polls.vue

<template>
<-- ...html -->
</template>

<script>
import { POLLS } from '@/gql/queries/poll.queries'
import { VOTE_ON_POLL } from '@/gql/mutations/poll.mutations'
import { OPTION_VOTED } from '@/gql/subscriptions/poll.subscriptions'

import SinglePoll from '@/components/SinglePoll.vue'

export default {
  components: {
    SinglePoll,
  },

  apollo: {
    polls: {
      query: POLLS,
      subscribeToMore: {
        document: OPTION_VOTED,
      }
    }
  },

  // ... code
}
</script>