I am getting the following warning:

```
Unable to verify SSL certificate for api.heroku.com
To disable SSL verification, run with HEROKU_SSL_VERIFY=disable

```

By searching Google I was able to find a few solutions. One of them says to add `HEROKU_SSL_VERIFY=disable` to `.bashrc`. Unfortunately, I am not able to edit that file. When I try I get the following error:

```
'readonly' option is set (add ! to override)

```

`!wq is used in place of :wq`, but no response.

Does anybody have any ideas on how I can fix this?