diff --git a/target/dovecot/10-ssl.conf b/target/dovecot/10-ssl.conf
index b65a0642..232fa58b 100644
--- a/target/dovecot/10-ssl.conf
+++ b/target/dovecot/10-ssl.conf
@@ -43,7 +43,7 @@ ssl_key = </etc/dovecot/private/dovecot.pem
 #ssl_cert_username_field = commonName
 
 # DH parameters length to use.
-#ssl_dh_parameters_length = 1024
+ssl_dh_parameters_length = 2048
 
 # SSL protocols to use
 ssl_protocols = !SSLv2 !SSLv3