I’m seeing the following error when running my Django app on Heroku:

connection to server at "127.0.0.1", port 6000 failed: server does not support SSL, but SSL was required

In settings.py, I have my DATABASES variable configured like this:

if env.get("DJANGO_DEVELOPMENT"):
    DATABASES = {
        "default": {
            "ENGINE": "django.db.backends.postgresql",
            "OPTIONS": {
                "service": env.get("DATABASE_SERVICE"),
            },
        }
    }
else:
    DATABASES = {
        "default": dj_database_url.config(
            conn_max_age=500, ssl_require=True
        )
    }

However, I notice that the error page lists the DATABASES variable, and this includes sslmode': 'require:

DATABASES   
{'default': {'ATOMIC_REQUESTS': False,
             'AUTOCOMMIT': True,
             'CONN_HEALTH_CHECKS': False,
             'CONN_MAX_AGE': 600,
             'ENGINE': 'django.db.backends.postgresql',
             'HOST': '127.0.0.1',
             'NAME': 'db1',
             'OPTIONS': {'sslmode': 'require'},
             'PASSWORD': '********************',
             'PORT': 6000,
             'TEST': {'CHARSET': None,
                      'COLLATION': None,
                      'MIGRATE': True,
                      'MIRROR': None,
                      'NAME': None},
             'TIME_ZONE': None,
             'USER': 'zvchpwwqszbgax'}}

Have I configured something incorrectly? I assume that Heroku enables SSL for the attached Postgres database, and see it as “required” seems like the correct setting is enabled.