More than 50 domains on WP Multisite installation

I have a multisite installation with 121 domains.  All sites run off of the same theme, though theme settings can change the look of the 1 page sites.  There is a form on the bottom of the page, which is html/php (not a WP plugin). I was going to insert code for a reCaptcha, but when I pasted in the domain names, google told me that their is a limit of 50 domains per key.  I need this to be one installation of reCaptcha because I only am going to be inserting it into one home.php file. I can't set up 2 keys/recaptcha because all 121 sites are connected to the same theme files. Is there a work-around for a situation like this? Let me know Thanks Bob -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://bit.ly/1dkFnYd. For more options, visit http://bit.ly/P65DvS.