Certificate verify failed on python 3.7.0

```
ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: IP address mismatch, certificate is not valid for '127.0.0.1'. (_ssl.c:1045)
```

You may update the self-signed certificate.

> You have to include a SAN field of type IP address.
https://bugs.python.org/issue34440