diff --git a/install_update_dovecot.sh b/install_update_dovecot.sh
index 06d993d..d39bf32 100755
--- a/install_update_dovecot.sh
+++ b/install_update_dovecot.sh
@@ -1384,7 +1384,7 @@ if [[ $dovecot_major_version -ge 3 ]] \
    if [[ ! -f "$dh_pem_file" ]] ; then
       echononl "\tCreate SSL DH parameters '$dh_pem_file'.."
       echo -en "$rc_wait"
-      openssl dhparam -out "$dh_pem_file" 4096 > /dev/null 2>&1
+      openssl dhparam -dsaparam -out "$dh_pem_file" 4096 > /dev/null 2>&1
 		if [[ $? -eq 0 ]]; then
 			echo -e "$rc_done"
 		else