diff --git a/conf/php-fpm.ini b/conf/php-fpm.ini
deleted file mode 100644
index 5c27d59..0000000
--- a/conf/php-fpm.ini
+++ /dev/null
@@ -1,10 +0,0 @@
-; Common values to change to increase file upload limit
-; upload_max_filesize = 50M
-; post_max_size = 50M
-; mail.add_x_header = Off
-
-; Other common parameters
-; max_execution_time = 600
-; max_input_time = 300
-; memory_limit = 256M
-; short_open_tag = On
diff --git a/scripts/backup b/scripts/backup
index 1005ffe..8970d54 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -36,7 +36,15 @@ db_name=$(ynh_app_setting_get $app db_name)
 # BACKUP THE APP MAIN DIR
 #=================================================
 
-ynh_backup "$final_path"
+#backup frontend config
+ynh_backup "$final_path/conf/zabbix.conf.php"
+
+#backup server confif
+ynh_backup "/etc/zabbix/zabbix_server.conf"
+
+#backup agent config
+ynh_backup "/etc/zabbix/zabbix_agentd.conf"
+ynh_backup "/etc/zabbix/zabbix_agentd.d"
 
 #=================================================
 # BACKUP THE NGINX CONFIGURATION
@@ -49,7 +57,6 @@ ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf"
 #=================================================
 
 ynh_backup "/etc/php/7.0/fpm/pool.d/$app.conf"
-ynh_backup "/etc/php/7.0/fpm/conf.d/20-$app.ini"
 
 #=================================================
 # BACKUP THE MYSQL DATABASE
diff --git a/scripts/upgrade b/scripts/upgrade
index 6a76809..0fbf135 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -48,19 +48,6 @@ if [ -z $final_path ]; then
 	ynh_app_setting_set $app final_path $final_path
 fi
 
-#=================================================
-# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
-#=================================================
-
-# Backup the current version of the app
-ynh_backup_before_upgrade
-ynh_clean_setup () {
-	# restore it if the upgrade fails
-	ynh_restore_upgradebackup
-}
-# Exit if an error occurs during the execution of the script
-ynh_abort_if_errors
-
 #=================================================
 # CHECK THE PATH
 #=================================================
@@ -71,87 +58,55 @@ path_url=$(ynh_normalize_url_path $path_url)
 #=================================================
 # STANDARD UPGRADE STEPS
 #=================================================
-# DOWNLOAD, CHECK AND UNPACK SOURCE
-#=================================================
 
-# Download, check integrity, uncompress and patch the source from app.src
-ynh_setup_source "$final_path"
+ynh_package_update
 
-#=================================================
-# NGINX CONFIGURATION
-#=================================================
+zabbixServerInstalledVersion=$(apt-cache policy zabbix-server-mysql | grep -Po "Installed: \K(.*)")
+zabbixServerCandidateVersion=$(apt-cache policy zabbix-server-mysql | grep -Po "Candidate: \K(.*)")
 
-# Create a dedicated nginx config
-ynh_add_nginx_config
+zabbixFrontendInstalledVersion=$(apt-cache policy zabbix-frontend-php | grep -Po "Installed: \K(.*)")
+zabbixFrontendCandidateVersion=$(apt-cache policy zabbix-frontend-php | grep -Po "Candidate: \K(.*)")
 
-#=================================================
-# UPGRADE DEPENDENCIES
-#=================================================
+zabbixagentInstalledVersion=$(apt-cache policy zabbix-agent | grep -Po "Installed: \K(.*)")
+zabbixagentCandidateVersion=$(apt-cache policy zabbix-agent | grep -Po "Candidate: \K(.*)")
 
-ynh_install_app_dependencies deb1 deb2
-
-#=================================================
-# CREATE DEDICATED USER
-#=================================================
-
-# Create a dedicated user (if not existing)
-ynh_system_user_create $app
-
-#=================================================
-# PHP-FPM CONFIGURATION
-#=================================================
-
-# Create a dedicated php-fpm config
-ynh_add_fpm_config
-
-#=================================================
-# SPECIFIC UPGRADE
-#=================================================
-# ...
-#=================================================
-
-### Verify the checksum of a file, stored by `ynh_store_file_checksum` in the install script.
-### And create a backup of this file if the checksum is different. So the file will be backed up if the admin had modified it.
-ynh_backup_if_checksum_is_different "$final_path/CONFIG_FILE"
-# Recalculate and store the checksum of the file for the next upgrade.
-ynh_store_file_checksum "$final_path/CONFIG_FILE"
-
-#=================================================
-# SETUP LOGROTATE
-#=================================================
-
-# Use logrotate to manage app-specific logfile(s)
-ynh_use_logrotate --non-append
-
-#=================================================
-# SETUP SYSTEMD
-#=================================================
-
-# Create a dedicated systemd config
-ynh_add_systemd_config
-
-#=================================================
-# GENERIC FINALIZATION
-#=================================================
-# SECURE FILES AND DIRECTORIES
-#=================================================
-
-# Set permissions on app files
-chown -R root: $final_path
-
-#=================================================
-# SETUP SSOWAT
-#=================================================
-
-# Make app public if necessary
-if [ $is_public -eq 1 ]
+if [ "$zabbixServerInstalledVersion" != "$zabbixServerCandidateVersion" -o "$zabbixFrontendInstalledVersion" != "$zabbixFrontendCandidateVersion" -o "$zabbixagentInstalledVersion" != "$zabbixagentCandidateVersion" ] 
 then
-	# unprotected_uris allows SSO credentials to be passed anyway
-	ynh_app_setting_set $app unprotected_uris "/"
+    #=================================================
+    # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
+    #=================================================
+    
+    # Backup the current version of the app
+    ynh_backup_before_upgrade
+    ynh_clean_setup () {
+    	# restore it if the upgrade fails
+    	ynh_restore_upgradebackup
+    }
+    # Exit if an error occurs during the execution of the script
+    ynh_abort_if_errors
+    
+    cp -rp /etc/zabbix /tmp/
+    cp -p /usr/share/zabbix/conf/zabbix.conf.php /tmp/
+    
+    DEBIAN_FRONTEND=noninteractive apt-mark unhold zabbix-server-mysql zabbix-frontend-php
+    DEBIAN_FRONTEND=noninteractive apt-get -y download zabbix-frontend-php
+    ar x *.deb
+    tar xzf control.tar.gz
+    sed -i 's/apache2 | httpd, //' control
+    tar --ignore-failed-read -cvzf control.tar.gz {post,pre}{inst,rm} md5sums control
+    ar rcs zabbix-frontend-php+stretch_all-noapache2.deb debian-binary control.tar.gz data.tar.xz
+    dpkg -i zabbix-frontend-php+stretch_all-noapache2.deb
+    rm -fr zabbix-*.deb
+    apt-get -y --only-upgrade install zabbix-server-mysql zabbix-agent
+    DEBIAN_FRONTEND=noninteractive apt-mark hold zabbix-server-mysql zabbix-frontend-php
+    
+    rm /usr/share/zabbix/conf/zabbix.conf.php
+    cp -rpf /tmp/zabbix /etc/
+    cp -pf /tmp/zabbix.conf.php /usr/share/zabbix/conf/
+    
+    rm -fr /tmp/zabbix*
+    
+    systemctl reload nginx
+else
+    ynh_print_info "Nothing to update !"
 fi
-
-#=================================================
-# RELOAD NGINX
-#=================================================
-
-systemctl reload nginx