diff --git a/data/templates/dovecot/dovecot.conf b/data/templates/dovecot/dovecot.conf
index 0a3c185ee..8fc0e75ae 100644
--- a/data/templates/dovecot/dovecot.conf
+++ b/data/templates/dovecot/dovecot.conf
@@ -14,8 +14,8 @@ mail_plugins = $mail_plugins quota
 
 ###############################################################################
 
-# generated 2020-04-03, Mozilla Guideline v5.4, Dovecot 2.2.27, OpenSSL 1.1.1l, intermediate configuration
-# https://ssl-config.mozilla.org/#server=dovecot&version=2.2.27&config=intermediate&openssl=1.1.1l&guideline=5.4
+# generated 2020-04-03, Mozilla Guideline v5.4, Dovecot 2.2.27, OpenSSL 1.1.0l, intermediate configuration
+# https://ssl-config.mozilla.org/#server=dovecot&version=2.2.27&config=intermediate&openssl=1.1.0l&guideline=5.4
 
 ssl = required
 
@@ -25,7 +25,7 @@ ssl_key = </etc/yunohost/certs/{{ main_domain }}/key.pem
 ssl_dh_parameters_length = 2048
 
 # intermediate configuration
-ssl_protocols = TLSv1.2 TLSv1.3
+ssl_protocols = TLSv1.2
 ssl_cipher_list = ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384
 ssl_prefer_server_ciphers = no