diff --git a/scripts/upgrade b/scripts/upgrade
index 6a76809..d8c9ea9 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -71,11 +71,19 @@ 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"
+DEBIAN_FRONTEND=noninteractive apt-mark unhold zabbix-server-mysql zabbix-frontend-php
+ynh_package_update
+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
 
 #=================================================
 # NGINX CONFIGURATION