specify the cipher in code?

I tried using this in combination with puppeteer but it rejects the certs due to the fact that the browser doesn't accept the certificate cypher. Is there a way to say something like this?

```js
pem.createCertificate({ days: 1, selfSigned: true, cipher: `TLS_AES_256_GCM_SHA384` }, function (err, keys) {
if (err) {
throw err
}
https.createServer({ key: keys.clientKey, cert: keys.certificate }, function (req, res) {
res.end('o hai!')
}).listen(443)
})
```