diff --git a/scripts/upgrade b/scripts/upgrade
index f52658e..e4a816d 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -18,10 +18,7 @@ app=$YNH_APP_INSTANCE_NAME
 
 domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
-language=$(ynh_app_setting_get --app=$app --key=language)
-admin=$(ynh_app_setting_get --app=$app --key=admin)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
-db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 
 #=================================================
 # CHECK VERSION
@@ -54,9 +51,6 @@ ynh_abort_if_errors
 #=================================================
 # STOP SYSTEMD SERVICE
 #=================================================
-ynh_script_progression --message="Stopping a systemd service..." --time --weight=1
-
-ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/$app.log"
 
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
@@ -142,9 +136,6 @@ ynh_add_nginx_config
 #=================================================
 # UPGRADE DEPENDENCIES
 #=================================================
-ynh_script_progression --message="Upgrading dependencies..." --time --weight=1
-
-ynh_install_app_dependencies $pkg_dependencies
 
 #=================================================
 # PHP-FPM CONFIGURATION
@@ -163,35 +154,10 @@ ynh_add_fpm_config
 #=================================================
 # UPDATE A CONFIG FILE
 #=================================================
-ynh_script_progression --message="Updating a configuration file..." --time --weight=1
-
-### Same as during install
-###
-### The file will automatically be backed-up if it's found to be manually modified (because
-### ynh_add_config keeps track of the file's checksum)
-
-ynh_add_config --template="some_config_file" --destination="$final_path/some_config_file"
-
-# FIXME: this should be handled by the core in the future
-# You may need to use chmod 600 instead of 400,
-# for example if the app is expected to be able to modify its own config
-chmod 400 "$final_path/some_config_file"
-chown $app:$app "$final_path/some_config_file"
-
-### For more complex cases where you want to replace stuff using regexes,
-### you shoud rely on ynh_replace_string (which is basically a wrapper for sed)
-### When doing so, you also need to manually call ynh_store_file_checksum
-###
-### ynh_replace_string --match_string="match_string" --replace_string="replace_string" --target_file="$final_path/some_config_file"
-### ynh_store_file_checksum --file="$final_path/some_config_file"
 
 #=================================================
 # SETUP SYSTEMD
 #=================================================
-ynh_script_progression --message="Upgrading systemd configuration..." --time --weight=1
-
-# Create a dedicated systemd config
-ynh_add_systemd_config
 
 #=================================================
 # GENERIC FINALIZATION
@@ -206,24 +172,14 @@ ynh_use_logrotate --non-append
 #=================================================
 # INTEGRATE SERVICE IN YUNOHOST
 #=================================================
-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"
 
 #=================================================
 # START SYSTEMD SERVICE
 #=================================================
-ynh_script_progression --message="Starting a systemd service..." --time --weight=1
-
-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"
 
 #=================================================
 # RELOAD NGINX