PHP7 support

Planning to upgrade to latest WP and PHP7.

But PHP Compatibility Checker says:

FILE: /homepages/30/d556882726/htdocs/wp/live/wp-content/plugins/wangguard/wangguard-class-wp-queue.php
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FOUND 1 ERROR AFFECTING 1 LINE
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7 | ERROR | Deprecated PHP4 style constructor are not supported since PHP7
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FILE: /homepages/30/d556882726/htdocs/wp/live/wp-content/plugins/wangguard/wangguard-help.php
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FOUND 1 ERROR AFFECTING 1 LINE
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371 | ERROR | Extension ‘mysql_’ is deprecated since PHP 5.5 and removed since PHP 7.0 – use mysqli instead.
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FILE: /homepages/30/d556882726/htdocs/wp/live/wp-content/plugins/wangguard/wangguard-class-wp-users.php
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FOUND 1 ERROR AFFECTING 1 LINE
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8 | ERROR | Deprecated PHP4 style constructor are not supported since PHP7
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FILE: /homepages/30/d556882726/htdocs/wp/live/wp-content/plugins/wangguard/wangguard-xml.php
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FOUND 1 ERROR AFFECTING 1 LINE
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57 | ERROR | Deprecated PHP4 style constructor are not supported since PHP7
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Any chance of a fix?