diff --git a/netoik-rp.spec b/netoik-rp.spec
index 089f7c3..8c1ce1c 100644
--- a/netoik-rp.spec
+++ b/netoik-rp.spec
@@ -41,7 +41,7 @@ if [ $1 == 1 ]; then
   %{_bindir}/env printf "\nAutomatic certbot renew\n0 12 * * * root sleep $((RANDOM % 3600)) && certbot renew -q\n" >> %{_sysconfdir}/crontab
 
   # Create ssl dh params
-  %{_bindir}/env openssl dhparam -out %{_sysconfdir}/letsencrypt/ssl-dhparams.pem
+  %{_bindir}/env openssl dhparam -out %{_sysconfdir}/letsencrypt/ssl-dhparams.pem 2048
 
   # Stop nginx to be sure changes are taken in account
   %{_bindir}/env systemctl stop nginx