Recaptcha image verification displays inappropriate images

We recently implemented the recaptcha v2 API on our website's contact form and it sometimes prompts the user to match images to a phrase. The images that it displayed in one case contained what appears to be a bag of marijuana (see attachment). This is obviously not a very professional image to display on our company's website.Is there any way to prevent image-based captcha verifications or restrict them in any way?Thanks -- 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.