Params get encoded

Hi Prometheus Team
I want to know if i can prevent Prometheus from encoding the characters
scrape_configs:

  • job_name: ‘somename’
    params:
    prefix: [‘finatra’]
    url: [‘http://:9090/admin/metrics.json’]

When i do that,i get params encoded:
url=http%3A%2F%2F%3A9090%2Fadmin%2Fmetrics.json

Is there any idea?
Thanks