Can’t Activate

I just downloaded your plugin v2.1.0 on a new site I’m developing and when I went to activate it, got a fatal error:

Parse error: syntax error, unexpected ‘[‘ in …/wp-content/plugins/woocommerce-mailchimp/includes/class-ss-wc-mailchimp-plugin.php on line 445

Any updates coming out to fix this?

Thanks,
Jennifer