No puedo actualizar metassploit

[.:UND3R:.]

Hola a todos al intentar hacerlo me aparece esto:

The certificate is not issued by a trusted authority. Use the
   fingerprint to validate the certificate manually!
Certificate information:
- Hostname: metasploit.com
- Valid: from Tue, 16 Mar 2010 12:09:59 GMT until Mon, 01 Apr 2013 22:02:24 GMT
- Issuer: 07969287, http://certificates.godaddy.com/repository, GoDaddy.com, Inc., Scottsdale, Arizona, US

Gracias