diff --git a/scripts/install b/scripts/install
index 0627ab9..7ff9024 100644
--- a/scripts/install
+++ b/scripts/install
@@ -12,7 +12,7 @@ source /usr/share/yunohost/helpers
 secret_key=$(ynh_string_random --length=50)
 ynh_app_setting_set --app=$app --key=secret_key --value=$secret_key
 
-ynh_app_setting_set --app=$app --key=smtp_disable_email --value=no
+ynh_app_setting_set --app=$app --key=smtp_disable_email --value=0
 ynh_app_setting_set --app=$app --key=smtp_host --value=$domain
 ynh_app_setting_set --app=$app --key=smtp_port --value=25
 ynh_app_setting_set --app=$app --key=smtp_user --value=$app
diff --git a/scripts/upgrade b/scripts/upgrade
index 965b543..54c25ce 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -43,7 +43,7 @@ if [ -z "${smtp_host:-}" ]; then
 		ynh_replace_string --match_string="const SMTP_" --replace_string="//const SMTP_" --target_file=$user_conf
 		ynh_replace_string --match_string="const MAIL_" --replace_string="//const MAIL_" --target_file=$user_conf
 	else
-		disable_email=no
+		disable_email=0
 		smtp_host=$domain
 		smtp_port=25
 		smtp_user=$app