 and some other services must be upgraded.
        </p>

        <p>
            There is no automated upgrade system for extensions; if an extension
            must be upgraded, you must do it manually. If the extension has any
            python code, this will mean replacing any v2-compatible code with
            v3-compatible code. In some cases parts of the configuration file
            <span class='code'>weewx.conf</span> must be modified.
        </p>

        <p>
            For example, to updat