RESPONSE TOKEN Length

I have a client / server implementation of reCAPTCHA. My implementation is sensitive to the length of the response token field, and I've noticed recently that the length of this field has increased. Is there a maximum length for the response token variable? Thanks for all responses! -- 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.