There is a newer OCSP response but was not provided by the server

[173279834462]

Hello, 

nginx is not updating the OCSP response cache. 

openssl says:
    [...]
    Cert Status: good
    This Update: Sep  9 09:59:46 2015 GMT
    Next Update: Sep 11 09:59:46 2015 GMT

gnutls says "There is a newer OCSP response but was not provided by the
server". 

The configuration says:

   [...]
   ssl_stapling on;
   ssl_stapling_verify on;
   ssl_stapling_file [...]/ssl/ocsp-response.der;
   [...]


How do you enforce automatic update of the OCSP response cache?

Some server's "next update" occurs at a later date than 48h. 
How do you enfoce, say, a 6days next update? 

Thank you for your time.

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,261716,261716#msg-261716