If I've generated new 4096-bit DH parameters to get that green A+ on SSL labs, do I need to regenerate now? i.e. I've run openssl dhparam -out dhparam.pem 4096

If I've generated new 4096-bit DH parameters to get that green A+ on SSL labs, do I need to regenerate now? i.e. I've run openssl dhparam -out dhparam.pem 4096 on a potentially vulnerable version of OpenSSL.