diff --git a/scripts/.fonctions b/scripts/.fonctions
index 2fa2017..b4dac42 100644
--- a/scripts/.fonctions
+++ b/scripts/.fonctions
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-ynh_version="2.4"
+ynh_version="2.5"
 
 YNH_VERSION () {	# Returns the version number of the Yunohost moulinette
 	ynh_version=$(sudo yunohost -v | grep "moulinette:" | cut -d' ' -f2 | cut -d'.' -f1,2)
@@ -109,12 +109,21 @@ CHECK_MD5_CONFIG () {	# Created a backup of the config file if it was changed.
 }
 
 FIND_PORT () {	# Search free port
-	# $1 = Port number to start the search.
-	port=$1
-	while ! sudo yunohost app checkport $port ; do
-		port=$((port+1))
-	done
-	CHECK_VAR "$port" "port empty"
+	if [ YNH_VERSION = "2.5" ]; then
+		# $1 = Port number to start the search.
+		port=$1
+		while ! sudo yunohost app checkport $port ; do
+			port=$((port+1))
+		done
+		CHECK_VAR "$port" "port empty"
+	else
+		# $1 = Port number to start the search.
+		port=$1
+		if [ "$(sudo yunohost tools port-available $port)" = "True" ]; then
+			port=$((port+1))
+		fi
+		CHECK_VAR "$port" "port empty"
+	fi
 }
 
 
@@ -174,35 +183,6 @@ REMOVE_SYS_USER () {   # Delete user
 # BACKUP
 #=================================================
 
-BACKUP_FAIL_UPGRADE () {
-	WARNING echo "Upgrade failed."
-	app_bck=${app//_/-}	# Replace all '_' by '-'
-	if sudo yunohost backup list | grep -q $app_bck-pre-upgrade$backup_number; then	# Vérifie l'existence de l'archive avant de supprimer l'application et de restaurer
-		sudo yunohost app remove $app	# Supprime l'application avant de la restaurer.
-		sudo yunohost backup restore --ignore-hooks $app_bck-pre-upgrade$backup_number --apps $app --force	# Restore the backup if upgrade failed
-		ynh_die "The app was restored to the way it was before the failed upgrade."
-	fi
-}
-
-BACKUP_BEFORE_UPGRADE () {	# Backup the current version of the app, restore it if the upgrade fails
-	backup_number=1
-	old_backup_number=2
-	app_bck=${app//_/-}	# Replace all '_' by '-'
-	if sudo yunohost backup list | grep -q $app_bck-pre-upgrade1; then	# Vérifie l'existence d'une archive déjà numéroté à 1.
-		backup_number=2	# Et passe le numéro de l'archive à 2
-		old_backup_number=1
-	fi
-
-	sudo yunohost backup create --ignore-hooks --apps $app --name $app_bck-pre-upgrade$backup_number	# Créer un backup différent de celui existant.
-	if [ "$?" -eq 0 ]; then	# Si le backup est un succès, supprime l'archive précédente.
-		if sudo yunohost backup list | grep -q $app_bck-pre-upgrade$old_backup_number; then	# Vérifie l'existence de l'ancienne archive avant de la supprimer, pour éviter une erreur.
-			QUIET sudo yunohost backup delete $app_bck-pre-upgrade$old_backup_number
-		fi
-	else	# Si le backup a échoué
-		ynh_die "Backup failed, the upgrade process was aborted."
-	fi
-}
-
 # Manage a fail of the script
 #
 # Print a warning to inform that the script was failed
diff --git a/scripts/upgrade b/scripts/upgrade
index 8e65dfe..adcf977 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -41,17 +41,6 @@ then	# Si final_path n'est pas renseigné dans la config yunohost, cas d'ancien
 	final_path=/var/www/$app
 fi
 
-#=================================================
-# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
-#=================================================
-
-BACKUP_BEFORE_UPGRADE	# Backup the current version of the app
-ynh_clean_setup () {
-	BACKUP_FAIL_UPGRADE	# restore it if the upgrade fails
-}
-ynh_abort_if_errors	# Active trap pour arrêter le script si une erreur est détectée.
-
-
 CHECK_PATH	# Checks and corrects the syntax of the path.
 
 # Get source
@@ -120,13 +109,13 @@ popd	# Revient au dossier courant avant pushd
 # SECURING FILES AND DIRECTORIES
 #=================================================
 
-sudo chown -R root: $final_path
+sudo chown -R www-data: $final_path
 
 #=================================================
 # RESTART LUFI
 #=================================================
 
-sudo systemctl restart lufi
+sudo systemctl restart lufi.service
 
 #=================================================
 # SETUP SSOWAT