QNetworkRequest works for HTTP, but not HTTPS

[Rodrigo Alves]

So, I'm using a QNetworkRequest to get request from my website.

This is the code:

QNetworkRequest WebContact::getRequest()
{
    QNetworkRequest request;
    request.setUrl(QUrl(contactURL));
    request.setHeader(QNetworkRequest::ContentTypeHeader,QVariant("application/x-www-form-urlencoded"));
    return request;
}

QNetworkRequest WebContact::getRequest()
{
    QNetworkRequest request;
    request.setUrl(QUrl(contactURL));
    request.setHeader(QNetworkRequest::ContentTypeHeader,QVariant("application/x-www-form-urlencoded"));
    return request;
}

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When running on Qt Creator, the contactURL works perfectly both for HTTP and HTTPS.
However, when I compile and run outside Qt Creator, only the HTTP that works. Am I forgetting to add a library or something?