Stuck on creating Diffie Helman Group Cert

==== Required information ====
- iRedMail version: 0.9.2
- Store mail accounts in which backend (LDAP/MySQL/PGSQL): MYSQL
- Web server (Apache or Nginx): Nginx
- Linux/BSD distribution name and version: Raspbian
- Related log if you're reporting an issue:
====

Im trying to configure iRedMail, but it is stuck on:

Creating a self signed SSL certification files (2048 bits).
Generating a strong, unique Diffie Hellman Group with openssl, please wait.

Is there a way to make it actually make something, because I left it over night.

Thanks in advanced!