Php 7 & Vantage

Hi,

I just ran Php compatibility checker and it gave me one error about vantage:

FILE: /wp-content/themes/vantage/inc/settings/inc/sanitize.php
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FOUND 1 ERROR AFFECTING 1 LINE
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82 | ERROR | Function name, class name, namespace name or constant name can not be reserved keyword ‘float’ (since version 7.0)

Is it safe to update the php version or should I fix that line… If I should, how? Thanks!