diff --git a/scripts/upgrade b/scripts/upgrade
index 6e61d9f..ed2c219 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -18,10 +18,8 @@ app=$YNH_APP_INSTANCE_NAME
 
 domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
-admin=$(ynh_app_setting_get --app=$app --key=admin)
 is_public=$(ynh_app_setting_get --app=$app --key=is_public)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-language=$(ynh_app_setting_get --app=$app --key=language)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 
 #=================================================
@@ -39,25 +37,7 @@ upgrade_type=$(ynh_check_app_version_changed)
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================
-ynh_script_progression --message="Ensuring downward compatibility..." --time --weight=1
-
-#
-# N.B. : the followings setting migrations snippets are provided as *EXAMPLES*
-# of what you may want to do in some cases (e.g. a setting was not defined on
-# some legacy installs and you therefore want to initiaze stuff during upgrade)
-#
-
-# If db_name doesn't exist, create it
-#if [ -z "$db_name" ]; then
-#	db_name=$(ynh_sanitize_dbid --db_name=$app)
-#	ynh_app_setting_set --app=$app --key=db_name --value=$db_name
-#fi
-
-# If final_path doesn't exist, create it
-#if [ -z "$final_path" ]; then
-#	final_path=/var/www/$app
-#	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
-#fi
+#ynh_script_progression --message="Ensuring downward compatibility..." --time --weight=1
 
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
@@ -105,9 +85,16 @@ ynh_add_nginx_config
 #=================================================
 # UPGRADE DEPENDENCIES
 #=================================================
-ynh_script_progression --message="Upgrading dependencies..." --time --weight=1
 
-ynh_install_app_dependencies $pkg_dependencies
+# TODO: check Go version and upgrade if needed
+if ! command -v /usr/local/go/bin/go &> /dev/null
+then
+        ynh_script_progression --message="Installing Go dependency... (this will take some time)" --time --weight=3
+        ynh_setup_source --source_id="go" --dest_dir="/usr/local/"
+fi
+
+export PATH=$PATH:/usr/local/go/bin
+env_path=$PATH
 
 #=================================================
 # CREATE DEDICATED USER
@@ -117,14 +104,6 @@ ynh_script_progression --message="Making sure dedicated system user exists..." -
 # Create a dedicated user (if not existing)
 ynh_system_user_create --username=$app
 
-#=================================================
-# PHP-FPM CONFIGURATION
-#=================================================
-ynh_script_progression --message="Upgrading PHP-FPM configuration..." --time --weight=1
-
-# Create a dedicated PHP-FPM config
-ynh_add_fpm_config
-
 #=================================================
 # SPECIFIC UPGRADE
 #=================================================
@@ -143,15 +122,6 @@ ynh_add_systemd_config
 # MODIFY A CONFIG FILE
 #=================================================
 
-### 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 --file="$final_path/CONFIG_FILE"
-
-ynh_replace_string --match_string="match_string" --replace_string="replace_string" --target_file="$final_path/CONFIG_FILE"
-
-# Recalculate and store the checksum of the file for the next upgrade.
-ynh_store_file_checksum --file="$final_path/CONFIG_FILE"
-
 #=================================================
 # GENERIC FINALIZATION
 #=================================================
@@ -159,7 +129,9 @@ ynh_store_file_checksum --file="$final_path/CONFIG_FILE"
 #=================================================
 
 # Set permissions on app files
-chown -R root: $final_path
+chown -R $app:root $final_path
+mkdir -p /var/log/$app
+chown -R $app:root /var/log/$app
 
 #=================================================
 # SETUP LOGROTATE
@@ -174,7 +146,7 @@ ynh_use_logrotate --non-append
 #=================================================
 ynh_script_progression --message="Integrating service in YunoHost..." --time --weight=1
 
-yunohost service add $app --description="A short description of the app" --log="/var/log/$app/$app.log"
+yunohost service add $app --description="Dendrite Matrix homeserver" --log="/var/log/$app/$app.log" --needs_exposed_ports "$tls_port"
 
 #=================================================
 # START SYSTEMD SERVICE
@@ -183,14 +155,6 @@ ynh_script_progression --message="Starting a systemd service..." --time --weight
 
 ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"
 
-#=================================================
-# UPGRADE FAIL2BAN
-#=================================================
-ynh_script_progression --message="Reconfiguring Fail2Ban..." --time --weight=1
-
-# Create a dedicated Fail2Ban config
-ynh_add_fail2ban_config --logpath="/var/log/nginx/${domain}-error.log" --failregex="Regex to match into the log for a failed login"
-
 #=================================================
 # SETUP SSOWAT
 #=================================================