diff --git a/scripts/upgrade b/scripts/upgrade
index e85a871..756d011 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -114,7 +114,7 @@ exec_console $app "${final_path}" cache:clear
 ynh_mysql_connect_as "$db_name" "$db_pwd" "$db_user"  <<< "UPDATE craue_config_setting SET value = 'https://$domain$path_url' WHERE name = 'wallabag_url'"
 
 # Set-up fail2ban
-ynh_add_fail2ban_config --logpath="/var/www/$app/var/logs/prod.log" --failregex='app.ERROR: Authentication failure for user "[\w]", from IP "<HOST>"' --max_retry=5 # same as install config
+ynh_add_fail2ban_config --logpath="/var/www/$app/var/logs/prod.log" --failregex='app.ERROR: Authentication failure for user "([\w]+)?", from IP "<HOST>"' --max_retry=5 # same as install config
 
 #=================================================
 # NGINX CONFIGURATION