diff --git a/modoboa_installer/scripts/files/nginx/modoboa.conf.tpl b/modoboa_installer/scripts/files/nginx/modoboa.conf.tpl
index a281371..e2b3d78 100644
--- a/modoboa_installer/scripts/files/nginx/modoboa.conf.tpl
+++ b/modoboa_installer/scripts/files/nginx/modoboa.conf.tpl
@@ -17,8 +17,8 @@ server {
 
     ssl_certificate %tls_cert_file;
     ssl_certificate_key %tls_key_file;
-    ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
-    ssl_ciphers "EECDH+AESGCM:EDH+AESGCM:ECDHE-RSA-AES128-GCM-SHA256:AES256+EECDH:DHE-RSA-AES128-GCM-SHA256:AES256+EDH:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA:DES-CBC3-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!MD5:!PSK:!RC4";
+    ssl_protocols TLSv1.2 TLSv1.3;
+    ssl_ciphers "ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA384";
     ssl_prefer_server_ciphers on;
     ssl_session_cache shared:SSL:10m;
     ssl_verify_depth 3;
diff --git a/modoboa_installer/ssl.py b/modoboa_installer/ssl.py
index 784e9d1..8df9b30 100644
--- a/modoboa_installer/ssl.py
+++ b/modoboa_installer/ssl.py
@@ -104,7 +104,7 @@ class LetsEncryptCertificate(CertificateBackend):
                 self.hostname, self.config.get("letsencrypt", "email")))
         with open("/etc/cron.d/letsencrypt", "w") as fp:
             fp.write("0 */12 * * * root certbot renew "
-                     "--quiet --no-self-upgrade --force-renewal\n")
+                     "--quiet\n")
         cfg_file = "/etc/letsencrypt/renewal/{}.conf".format(self.hostname)
         pattern = "s/authenticator = standalone/authenticator = nginx/"
         utils.exec_cmd("perl -pi -e '{}' {}".format(pattern, cfg_file))