How to disable autocomplete for inputs in contact form 7? [closed]

I have below code for contact form 7. Usually I use autocomplete="off" for html input field. However not able to figure out how to do the same for contact form 7

<div class="row">
<div class="col-md-6">
    [text* FirstName placeholder "First Name"]
</div>
<div class="col-md-6">
    [text* LastName placeholder "Last Name"]
</div>
<div class="col-md-12">
    [email* EmailAddress placeholder "Email Address"]
</div>
<div class="col-md-12">
    [text* desc placeholder "Tell us a bit about yourself..."]
</div>
<div class="col-md-12">
    [submit "Submit"]
</div>
</div>

Autocomplete tag in form settings does not work anymore (as today Contact Form 7 plugin version 5.1.3.

The only solution which worked for me was to add custom attributes thanks to https://stackoverflow.com/a/46316728/1720476.

E.g. if You have FirstName and LastName fields, where You want to disable autocomplete.

Add this into functions.php file:

add_filter( 'wpcf7_form_elements', 'imp_wpcf7_form_elements' );
function imp_wpcf7_form_elements( $content ) {
    $str_pos = strpos( $content, 'name="FirstName"' );
    if ($str_pos) {
        $content = substr_replace( $content, ' autocomplete="both" autocomplete="off" ', $str_pos, 0 );     
    }

    $str_pos = strpos( $content, 'name="LastName"' );
    if ($str_pos) {
        $content = substr_replace( $content, ' autocomplete="both" autocomplete="off" ', $str_pos, 0 );
    }

    return $content;
}