Error consuming web service on asp.net mvc5

I'm getting this error when trying to consume a webservice :

  

System.ArgumentException HResult = 0x80070057 Message = The provided   URI scheme 'http' is invalid; expected 'https' Parameter name: via
  Source = StackTrace:

I understand that the url expects a https while my webservice is http , I do not know how to configure it, I also had another error before I solved this way .