diff --git a/check_process b/check_process
index d34ff26..52d2af2 100644
--- a/check_process
+++ b/check_process
@@ -7,14 +7,14 @@
 		setup_sub_dir=0
 		setup_root=1
 		setup_nourl=0
-		setup_private=0
-		setup_public=0
-		upgrade=0
-		upgrade=0	from_commit=4eaade48e9bdccf56a53f09a269b2e5ba7621296
+		setup_private=1
+		setup_public=1
+		upgrade=1
+		upgrade=1	from_commit=4eaade48e9bdccf56a53f09a269b2e5ba7621296
 		backup_restore=1
 		multi_instance=0
-		port_already_use=0
-		change_url=0
+		port_already_use=1
+		change_url=1
 ;;; Options
 	Notification=all
 ;;; Upgrade options
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 82b1c02..0f67779 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -1,25 +1,31 @@
-#
-# Common variables & functions
-#
+#!/bin/bash
+
+#=================================================
+# COMMON VARIABLES
+#=================================================
 
 # Release to install
-VERSION=2021.12.8
+app_version=2021.12.8
 
 # Package dependencies
-PKG_DEPENDENCIES="python3 python3-dev python3-venv python3-pip libffi-dev libssl-dev libjpeg-dev zlib1g-dev autoconf build-essential libopenjp2-7 libtiff5 libturbojpeg0 libmariadbclient-dev libmariadb-dev-compat"
+pkg_dependencies="python3 python3-dev python3-venv python3-pip libffi-dev libssl-dev libjpeg-dev zlib1g-dev autoconf build-essential libopenjp2-7 libtiff5 libturbojpeg0 libmariadbclient-dev libmariadb-dev-compat"
 
 # Requirements (Major.Minor.Patch)
 # PY_VERSION=$(curl -s "https://www.python.org/ftp/python/" | grep ">3.9" | tail -n1 | cut -d '/' -f 2 | cut -d '>' -f 2)
 # Pyhton 3.9.2 will be shiped with bullseye
-PY_REQUIRED_VERSION=3.9.2
+py_required_version=3.9.2
+
+#=================================================
+# PERSONAL HELPERS
+#=================================================
 
 # Create homeassistant user
 mynh_system_user_create () {
-    USER_GROUPS=""
-    [ $(getent group dialout) ] && USER_GROUPS="${USER_GROUPS} dialout"
-    [ $(getent group gpio) ] && USER_GROUPS="${USER_GROUPS} gpio"
-    [ $(getent group i2c) ] && USER_GROUPS="${USER_GROUPS} i2c"
-    ynh_system_user_create --username="$app" --groups="$USER_GROUPS" --home_dir="$data_path"
+    user_groups=""
+    [ $(getent group dialout) ] && user_groups="${user_groups} dialout"
+    [ $(getent group gpio) ] && user_groups="${user_groups} gpio"
+    [ $(getent group i2c) ] && user_groups="${user_groups} i2c"
+    ynh_system_user_create --username=$app --groups="$user_groups" --home_dir="$data_path"
 }
 
 
@@ -41,34 +47,40 @@ myynh_version_compare () {
 	# 0 -> A = B
 	# 1 -> A > B
 	# 2 -> A < B
-	if [[ $1 == $2 ]] ; then
+	if [[ $1 == $2 ]]
+	then
 		echo 0; return
 	fi
 	local IFS=.
 	local i ver1=($1) ver2=($2)
 	# fill empty fields in ver1 with zeros
-	for ((i=${#ver1[@]}; i<${#ver2[@]}; i++)) ; do
+	for ((i=${#ver1[@]}; i<${#ver2[@]}; i++))
+	do
 		ver1[i]=0
 	done
-	for ((i=0; i<${#ver1[@]}; i++)) ; do
-		if [[ -z ${ver2[i]} ]] ; then
+	for ((i=0; i<${#ver1[@]}; i++))
+	do
+		if [[ -z ${ver2[i]} ]]
+		then
 			# fill empty fields in ver2 with zeros
 			ver2[i]=0
 		fi
-		if ((10#${ver1[i]} > 10#${ver2[i]})) ; then
+		if ((10#${ver1[i]} > 10#${ver2[i]}))
+		then
 			echo 1; return
 		fi
-		if ((10#${ver1[i]} < 10#${ver2[i]})) ; then
+		if ((10#${ver1[i]} < 10#${ver2[i]}))
+		then
 			echo 2; return
 		fi
 	done
 	echo 1; return
 }
 
-# Package dependencies
-# usage: myynh_install_dependencies --python="3.8.6"
+# Install specific python version
+# usage: myynh_install_python --python="3.8.6"
 # | arg: -p, --python=    - the python version to install
-myynh_install_dependencies () {
+myynh_install_python () {
 	# Declare an array to define the options of this helper.
 	local legacy_args=u
 	local -A args_array=( [p]=python= )
@@ -76,14 +88,12 @@ myynh_install_dependencies () {
 	# Manage arguments with getopts
 	ynh_handle_getopts_args "$@"
 	
-	# Install main dependencies from apt
-	ynh_install_app_dependencies "${PKG_DEPENDENCIES}"
-	
 	# Check python version from APT
 	local PY_APT_VERSION=$(python3 --version | cut -d ' ' -f 2)
 	
 	# Check existing built version of python in /usr/local/bin
-	if [ -e "/usr/local/bin/python${python:0:3}" ]; then
+	if [ -e "/usr/local/bin/python${python:0:3}" ]
+	then
 		local PY_BUILT_VERSION=$(/usr/local/bin/python${python:0:3} --version \
 			| cut -d ' ' -f 2)
 	else
@@ -91,20 +101,27 @@ myynh_install_dependencies () {
 	fi
 	
 	# Compare version
-	if [ $(myynh_version_compare $PY_APT_VERSION $python) -le 1 ]; then
+	if [ $(myynh_version_compare $PY_APT_VERSION $python) -le 1 ]
+	then
 		# APT >= Required
 		ynh_print_info --message="Using provided python3..."
+		
 		MY_PYTHON="python3"
+		
 	else
 		# Either python already built or to build 
-		if [ $(myynh_version_compare $PY_BUILT_VERSION $python) -le 1 ]; then
+		if [ $(myynh_version_compare $PY_BUILT_VERSION $python) -le 1 ]
+		then
 			# Built >= Required
 			ynh_print_info --message="Using already used python3 built version..."
+			
 			MY_PYTHON="/usr/local/bin/python${PY_BUILT_VERSION:0:3}"
+			
 		else
 			ynh_print_info --message="Installing additional dependencies to build python..."
-			PKG_DEPENDENCIES="${PKG_DEPENDENCIES} tk-dev libncurses5-dev libncursesw5-dev libreadline6-dev libdb5.3-dev libgdbm-dev libsqlite3-dev libbz2-dev libexpat1-dev liblzma-dev wget tar"
-			ynh_install_app_dependencies "${PKG_DEPENDENCIES}"
+			
+			pkg_dependencies="${pkg_dependencies} tk-dev libncurses5-dev libncursesw5-dev libreadline6-dev libdb5.3-dev libgdbm-dev libsqlite3-dev libbz2-dev libexpat1-dev liblzma-dev wget tar"
+			ynh_install_app_dependencies "${pkg_dependencies}"
 			# APT < Minimal & Actual < Minimal => Build & install Python into /usr/local/bin
 			ynh_print_info --message="Building python (may take a while)..."
 			# Store current direcotry 
@@ -130,7 +147,7 @@ myynh_install_dependencies () {
 		fi
 	fi
 	# Save python version in settings 
-	ynh_app_setting_set --app="$app" --key=python --value="$python"
+	ynh_app_setting_set --app=$app --key=python --value="$python"
 }
 
 # Install/Upgrade Homeassistant in virtual environement
@@ -145,7 +162,7 @@ myynh_install_homeassistant () {
 		&& echo 'install last version of mysqlclient' \
 			&& pip --cache-dir "$data_path/.cache" install --upgrade mysqlclient \
 		&& echo 'install Home Assistant' \
-			&& pip --cache-dir "$data_path/.cache" install --upgrade $app==$VERSION \
+			&& pip --cache-dir "$data_path/.cache" install --upgrade $app==$app_version \
 		"
 }
 
diff --git a/scripts/backup b/scripts/backup
index fcbb6d0..81e7a0e 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -25,14 +25,14 @@ ynh_print_info --message="Loading installation settings..."
 
 app=$YNH_APP_INSTANCE_NAME
 
-domain=$(ynh_app_setting_get --app="$app" --key=domain)
-port=$(ynh_app_setting_get --app="$app" --key=port)
-final_path=$(ynh_app_setting_get --app="$app" --key=final_path)
-data_path=$(ynh_app_setting_get --app="$app" --key=data_path)
-log_file=$(ynh_app_setting_get --app="$app" --key=log_file)
-path_url=$(ynh_app_setting_get --app="$app" --key=path_url)
-python=$(ynh_app_setting_get --app="$app" --key=python)
-db_name=$(ynh_app_setting_get --app="$app" --key=db_name)
+domain=$(ynh_app_setting_get --app=$app --key=domain)
+port=$(ynh_app_setting_get --app=$app --key=port)
+final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+data_path=$(ynh_app_setting_get --app=$app --key=data_path)
+log_file=$(ynh_app_setting_get --app=$app --key=log_file)
+path_url=$(ynh_app_setting_get --app=$app --key=path_url)
+python=$(ynh_app_setting_get --app=$app --key=python)
+db_name=$(ynh_app_setting_get --app=$app --key=db_name)
 
 #=================================================
 # DECLARE DATA AND CONF FILES TO BACKUP
@@ -83,7 +83,7 @@ ynh_backup --src_path="$(dirname "$log_file")"
 # BACKUP THE MYSQL DATABASE
 #=================================================
 ynh_print_info --message="Backing up the MySQL database..."
-ynh_mysql_dump_db --database="$db_name" > db.sql
+ynh_mysql_dump_db --database=$db_name > db.sql
 
 #=================================================
 # END OF SCRIPT
diff --git a/scripts/change_url b/scripts/change_url
index fd09911..d4cb65b 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -23,7 +23,7 @@ new_domain=$YNH_APP_NEW_DOMAIN
 #=================================================
 ynh_script_progression --message="Loading installation settings..."
 
-final_path=$(ynh_app_setting_get --app="$app" --key=final_path)
+final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 
 #=================================================
 # BACKUP BEFORE CHANGE URL THEN ACTIVE TRAP
@@ -54,7 +54,7 @@ fi
 #=================================================
 ynh_script_progression --message="Stopping a systemd service..."
 
-ynh_systemd_action --service_name="$app" --action=stop --log_path="/var/log/$app/$app.log"
+ynh_systemd_action --service_name=$app --action=stop --log_path="/var/log/$app/$app.log"
 
 #=================================================
 # MODIFY URL IN NGINX CONF
@@ -80,7 +80,7 @@ fi
 #=================================================
 ynh_script_progression --message="Starting a systemd service..."
 
-ynh_systemd_action --service_name="$app" --action=start --log_path="/var/log/$app/$app.log"
+ynh_systemd_action --service_name=$app --action=start --log_path="/var/log/$app/$app.log"
 
 #=================================================
 # RELOAD NGINX
diff --git a/scripts/install b/scripts/install
index bd0d117..bcaf8c3 100644
--- a/scripts/install
+++ b/scripts/install
@@ -42,17 +42,17 @@ path_url="/"
 ynh_script_progression --message="Validating installation parameters..."
 
 [ ! -d "$final_path" ] || ynh_die --message="There is already a directory: $final_path "
-ynh_webpath_register --app="$app" --domain="$domain" --path_url="$path_url"
+ynh_webpath_register --app=$app --domain="$domain" --path_url="$path_url"
 
 #=================================================
 # STORE SETTINGS FROM MANIFEST
 #=================================================
 ynh_script_progression --message="Storing installation settings..."
-ynh_app_setting_set --app="$app" --key=domain --value="$domain"
-ynh_app_setting_set --app="$app" --key=final_path --value="$final_path"
-ynh_app_setting_set --app="$app" --key=data_path --value="$data_path"
-ynh_app_setting_set --app="$app" --key=log_file --value="$log_file"
-ynh_app_setting_set --app="$app" --key=path_url --value="$path_url"
+ynh_app_setting_set --app=$app --key=domain --value="$domain"
+ynh_app_setting_set --app=$app --key=final_path --value="$final_path"
+ynh_app_setting_set --app=$app --key=data_path --value="$data_path"
+ynh_app_setting_set --app=$app --key=log_file --value="$log_file"
+ynh_app_setting_set --app=$app --key=path_url --value="$path_url"
 
 #=================================================
 # STANDARD MODIFICATIONS
@@ -62,14 +62,15 @@ ynh_app_setting_set --app="$app" --key=path_url --value="$path_url"
 ynh_script_progression --message="Finding an available port..."
 
 port=$(ynh_find_port 8123)
-ynh_app_setting_set --app="$app" --key=port --value="$port"
+ynh_app_setting_set --app=$app --key=port --value="$port"
 
 #=================================================
 # INSTALL DEPENDENCIES
 #=================================================
 ynh_script_progression --message="Installing dependencies..."
 
-myynh_install_dependencies --python="$PY_REQUIRED_VERSION"
+ynh_install_app_dependencies $pkg_dependencies
+myynh_install_python --python="$py_required_version"
 
 #=================================================
 # CREATE DEDICATED USER
@@ -83,10 +84,10 @@ mynh_system_user_create
 #=================================================
 ynh_script_progression --message="Creating a MySQL database..."
 
-db_name=$(ynh_sanitize_dbid --db_name="$app")
-db_user="$db_name"
-ynh_app_setting_set --app="$app" --key=db_name --value="$db_name"
-ynh_mysql_setup_db --db_user="$db_user" --db_name="$db_name"
+db_name=$(ynh_sanitize_dbid --db_name=$app)
+db_user=$db_name
+ynh_app_setting_set --app=$app --key=db_name --value=$db_name
+ynh_mysql_setup_db --db_user=$db_user --db_name=$db_name
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
@@ -95,11 +96,11 @@ ynh_script_progression --message="Setting up source files..."
 
 # create a directory for the installation of Home Assistant
 myynh_create_dir "$final_path"
-chown -R "$app": "$final_path"
+chown -R $app: "$final_path"
 
 # create a directory for the datas of Home Assistant
 myynh_create_dir "$data_path/.cache"
-chown -R "$app": "$data_path"
+chown -R $app: "$data_path"
 
 # installation in a virtual environment
 ynh_script_progression --message="Installing Home Assistant in a virtual environment..."
@@ -157,7 +158,7 @@ myynh_set_permissions
 ynh_script_progression --message="Integrating service in YunoHost..."
 
 # add service in admin panel
-yunohost service add "$app" --description="Home Assistant server" --log="$log_file" --needs_exposed_ports=$port
+yunohost service add $app --description="Home Assistant server" --log="$log_file" --needs_exposed_ports=$port
 
 #=================================================
 # START SYSTEMD SERVICE
@@ -165,13 +166,13 @@ yunohost service add "$app" --description="Home Assistant server" --log="$log_fi
 ynh_script_progression --message="Starting a systemd service..."
 
 # start systemd service with --verbose 
-ynh_systemd_action --service_name="$app" --action=start --line_match="Home Assistant initialized" --log_path="$log_file" --timeout=3600
+ynh_systemd_action --service_name=$app --action=start --line_match="Home Assistant initialized" --log_path="$log_file" --timeout=3600
 
 # remove --verbose from systemd service
 ynh_replace_string --match_string=" --verbose" --replace_string="" --target_file="/etc/systemd/system/$app.service"
 ynh_store_file_checksum --file="/etc/systemd/system/$app.service"
 systemctl daemon-reload
-ynh_systemd_action --service_name="$app" --action=restart
+ynh_systemd_action --service_name=$app --action=restart
 
 #=================================================
 # SETUP SSOWAT
diff --git a/scripts/remove b/scripts/remove
index 1d765b0..fdaccca 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -18,15 +18,15 @@ ynh_script_progression --message="Loading installation settings..."
 
 app=$YNH_APP_INSTANCE_NAME
 
-domain=$(ynh_app_setting_get --app="$app" --key=domain)
-port=$(ynh_app_setting_get --app="$app" --key=port)
-final_path=$(ynh_app_setting_get --app="$app" --key=final_path)
-data_path=$(ynh_app_setting_get --app="$app" --key=data_path)
-log_file=$(ynh_app_setting_get --app="$app" --key=log_file)
-path_url=$(ynh_app_setting_get --app="$app" --key=path_url)
-python=$(ynh_app_setting_get --app="$app" --key=python)
-db_name=$(ynh_app_setting_get --app="$app" --key=db_name)
-db_user="$db_name"
+domain=$(ynh_app_setting_get --app=$app --key=domain)
+port=$(ynh_app_setting_get --app=$app --key=port)
+final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+data_path=$(ynh_app_setting_get --app=$app --key=data_path)
+log_file=$(ynh_app_setting_get --app=$app --key=log_file)
+path_url=$(ynh_app_setting_get --app=$app --key=path_url)
+python=$(ynh_app_setting_get --app=$app --key=python)
+db_name=$(ynh_app_setting_get --app=$app --key=db_name)
+db_user=$db_name
 
 #=================================================
 # STANDARD REMOVE
@@ -34,9 +34,9 @@ db_user="$db_name"
 # REMOVE SERVICE INTEGRATION IN YUNOHOST
 #=================================================
 
-if ynh_exec_warn_less yunohost service status "$app" >/dev/null ; then
+if ynh_exec_warn_less yunohost service status $app >/dev/null ; then
 	ynh_script_progression --message="Removing $app service integration..."
-	yunohost service remove "$app"
+	yunohost service remove $app
 fi
 
 #=================================================
@@ -44,7 +44,7 @@ fi
 #=================================================
 ynh_script_progression --message="Stopping and removing the systemd service..."
 
-ynh_remove_systemd_config --service="$app"
+ynh_remove_systemd_config --service=$app
 
 #=================================================
 # REMOVE LOGROTATE CONFIGURATION
@@ -58,7 +58,7 @@ ynh_remove_logrotate
 #=================================================
 ynh_script_progression --message="Removing the MySQL database..."
 
-ynh_mysql_remove_db --db_user="$db_user" --db_name="$db_name"
+ynh_mysql_remove_db --db_user=$db_user --db_name=$db_name
 
 #=================================================
 # REMOVE APP MAIN DIR
@@ -121,7 +121,7 @@ ynh_secure_remove --file="$(dirname "$log_file")"
 #=================================================
 ynh_script_progression --message="Removing the dedicated system user..."
 
-ynh_system_user_delete --username="$app"
+ynh_system_user_delete --username=$app
 
 #=================================================
 # END OF SCRIPT
diff --git a/scripts/restore b/scripts/restore
index 9dd04c3..b9cd252 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -30,15 +30,15 @@ ynh_script_progression --message="Loading installation settings..."
 
 app=$YNH_APP_INSTANCE_NAME
 
-domain=$(ynh_app_setting_get --app="$app" --key=domain)
-port=$(ynh_app_setting_get --app="$app" --key=port)
-final_path=$(ynh_app_setting_get --app="$app" --key=final_path)
-data_path=$(ynh_app_setting_get --app="$app" --key=data_path)
-log_file=$(ynh_app_setting_get --app="$app" --key=log_file)
-path_url=$(ynh_app_setting_get --app="$app" --key=path_url)
-python=$(ynh_app_setting_get --app="$app" --key=python)
-db_name=$(ynh_app_setting_get --app="$app" --key=db_name)
-db_user="$db_name"
+domain=$(ynh_app_setting_get --app=$app --key=domain)
+port=$(ynh_app_setting_get --app=$app --key=port)
+final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+data_path=$(ynh_app_setting_get --app=$app --key=data_path)
+log_file=$(ynh_app_setting_get --app=$app --key=log_file)
+path_url=$(ynh_app_setting_get --app=$app --key=path_url)
+python=$(ynh_app_setting_get --app=$app --key=python)
+db_name=$(ynh_app_setting_get --app=$app --key=db_name)
+db_user=$db_name
 
 #=================================================
 # CHECK IF THE APP CAN BE RESTORED
@@ -86,16 +86,17 @@ mkdir -p $data_path
 #=================================================
 ynh_script_progression --message="Reinstalling dependencies..."
 
-myynh_install_dependencies --python="$python"
+ynh_install_app_dependencies $pkg_dependencies
+myynh_install_python --python="$python"
 
 #=================================================
 # RESTORE THE MYSQL DATABASE
 #=================================================
 ynh_script_progression --message="Restoring the MySQL database..."
 
-db_pwd=$(ynh_app_setting_get --app="$app" --key=mysqlpwd)
-ynh_mysql_setup_db --db_user="$db_user" --db_name="$db_name" --db_pwd="$db_pwd"
-ynh_mysql_connect_as --user="$db_user" --password="$db_pwd" --database="$db_name" < ./db.sql
+db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
+ynh_mysql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd="$db_pwd"
+ynh_mysql_connect_as --user=$db_user --password="$db_pwd" --database=$db_name < ./db.sql
 
 #=================================================
 # RESTORE VARIOUS FILES
@@ -112,7 +113,7 @@ ynh_restore_file --origin_path="$(dirname "$log_file")"
 ynh_script_progression --message="Restoring the systemd configuration..."
 
 ynh_restore_file --origin_path="/etc/systemd/system/$app.service"
-systemctl enable "$app".service --quiet
+systemctl enable $app.service --quiet
 
 #=================================================
 # RESTORE THE LOGROTATE CONFIGURATION
@@ -132,14 +133,14 @@ myynh_set_permissions
 #=================================================
 ynh_script_progression --message="Integrating service in YunoHost..."
 
-yunohost service add "$app" --description="Home Assistant server" --log="$log_file" --needs_exposed_ports=$port
+yunohost service add $app --description="Home Assistant server" --log="$log_file" --needs_exposed_ports=$port
 
 #=================================================
 # START SYSTEMD SERVICE
 #=================================================
 ynh_script_progression --message="Starting a systemd service..."
 
-ynh_systemd_action --service_name="$app" --action=start
+ynh_systemd_action --service_name=$app --action=start
 
 #=================================================
 # GENERIC FINALIZATION
@@ -155,12 +156,3 @@ ynh_systemd_action --service_name=nginx --action=reload
 #=================================================
 
 ynh_script_progression --message="Restoration completed for $app" --last
-
-#for debug purpose
-for ((i = 1 ; i <= 10 ; i++)); do
-    ynh_print_warn --message= "\r$i) $(date)"
-    ynh_local_curl
-    #curl --silent --show-error --insecure --location --header "Host: $domain" --resolve "$domain":443:127.0.0.1 "https://localhost/"
-    echo -e -n "\r"
-    sleep 10
-done
diff --git a/scripts/upgrade b/scripts/upgrade
index f2d2fb0..8c58784 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -16,8 +16,8 @@ ynh_script_progression --message="Loading installation settings..."
 
 app=$YNH_APP_INSTANCE_NAME
 
-domain=$(ynh_app_setting_get --app="$app" --key=domain)
-port=$(ynh_app_setting_get --app="$app" --key=port)
+domain=$(ynh_app_setting_get --app=$app --key=domain)
+port=$(ynh_app_setting_get --app=$app --key=port)
 
 #=================================================
 # CHECK VERSION
@@ -43,7 +43,7 @@ ynh_abort_if_errors
 #=================================================
 ynh_script_progression --message="Stopping a systemd service..."
 
-ynh_systemd_action --service_name="$app" --action=stop --log_path="/var/log/$app/$app.log"
+ynh_systemd_action --service_name=$app --action=stop --log_path="/var/log/$app/$app.log"
 
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
@@ -51,59 +51,67 @@ ynh_systemd_action --service_name="$app" --action=stop --log_path="/var/log/$app
 ynh_script_progression --message="Ensuring downward compatibility..."
 
 # changes introduce in 
-if [ -z $(ynh_app_setting_get --app="$app" --key=final_path) ]; then
+if [ -z $(ynh_app_setting_get --app=$app --key=final_path) ]
+then
 	final_path="/var/www/$app"
 	data_path="/home/yunohost.app/$app"
 	log_file="/var/log/$app/$app.log"
 	path_url="/"
-	ynh_app_setting_set --app="$app" --key=final_path --value="$final_path"
-	ynh_app_setting_set --app="$app" --key=data_path --value="$data_path"
-	ynh_app_setting_set --app="$app" --key=log_file --value="$log_file"
-	ynh_app_setting_set --app="$app" --key=path_url --value="$path_url"
+	ynh_app_setting_set --app=$app --key=final_path --value="$final_path"
+	ynh_app_setting_set --app=$app --key=data_path --value="$data_path"
+	ynh_app_setting_set --app=$app --key=log_file --value="$log_file"
+	ynh_app_setting_set --app=$app --key=path_url --value="$path_url"
 else
-	final_path=$(ynh_app_setting_get --app="$app" --key=final_path)
-	data_path=$(ynh_app_setting_get --app="$app" --key=data_path)
-	log_file=$(ynh_app_setting_get --app="$app" --key=log_file)
-	path_url=$(ynh_app_setting_get --app="$app" --key=path_url)
-	python=$(ynh_app_setting_get --app="$app" --key=python)
+	final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+	data_path=$(ynh_app_setting_get --app=$app --key=data_path)
+	log_file=$(ynh_app_setting_get --app=$app --key=log_file)
+	path_url=$(ynh_app_setting_get --app=$app --key=path_url)
+	python=$(ynh_app_setting_get --app=$app --key=python)
 fi
 
 # changes introduced in 2021.11.5~ynh1
-if [ -f "/etc/systemd/system/$app@$app.service" ]; then
+if [ -f "/etc/systemd/system/$app@$app.service" ]
+then
 	# remove old systemd service
-	if ynh_exec_warn_less yunohost service status "$app@$app" >/dev/null ; then
+	if ynh_exec_warn_less yunohost service status "$app@$app" >/dev/null
+	then
 		yunohost service remove "$app@$app"
 	fi
 	ynh_remove_systemd_config --service="$app@$app"
 fi
-if [ ! -d "$final_path" ]; then
+if [ ! -d "$final_path" ]
+then
 	# move $final_path to new directory
 	mv "/opt/yunohost/$app" "$final_path"
-	chown -R "$app": "$final_path"
+	chown -R $app: "$final_path"
 fi
-if [ ! -d "$data_path" ]; then
+if [ ! -d "$data_path" ]
+then
 	# move $data_path to new directory
 	mv "/""home""/$app" "$data_path"
 	find "$data_path/.$app" -maxdepth 1 -mindepth 1 -exec mv {} "$data_path" \;
 	rmdir "$data_path/.$app"
 	ynh_replace_string --match_string="/home/homeassistant/.homeassistant" --replace_string="$data_path" --target_file="$data_path/configuration.yaml"
-	chown -R "$app": "$data_path"
+	chown -R $app: "$data_path"
 fi
-if [ ! -f "$log_file" ]; then
+if [ ! -f "$log_file" ]
+then
 	# create a directory with its log file
 	myynh_create_dir "$(dirname "$log_file")"
 	touch "$log_file"
 fi
 
 # changes introduced in 2021.12.8~ynh1
-if [ -z $(ynh_app_setting_get --app="$app" --key=db_name) ]; then
+if [ -z $(ynh_app_setting_get --app=$app --key=db_name) ]
+then
 	# create a MySQL database
-	db_name=$(ynh_sanitize_dbid --db_name="$app")
-	db_user="$db_name"
-	ynh_app_setting_set --app=$app --key=db_name --value="$db_name"
-	ynh_mysql_setup_db --db_user="$db_user" --db_name="$db_name"
-	db_pwd=$(ynh_app_setting_get --app="$app" --key=mysqlpwd)
-	if [ -z $(sed -n "/recorder:/=" configuration.yaml) ]; then
+	db_name=$(ynh_sanitize_dbid --db_name=$app)
+	db_user=$db_name
+	ynh_app_setting_set --app=$app --key=db_name --value=$db_name
+	ynh_mysql_setup_db --db_user=$db_user --db_name=$db_name
+	db_pwd=$(ynh_app_setting_get --app=$app --key=mysqlpwd)
+	if [ -z $(sed -n "/recorder:/=" "$data_path/configuration.yaml") ]
+	then
 		sed -i "$ a recorder:" "$data_path/configuration.yaml"
 		sed -i "$ a \  db_url: mysql://$db_user:$db_pwd@127.0.0.1/$db_name?unix_socket=/var/run/mysqld/mysqld.sock&charset=utf8mb4" "$data_path/configuration.yaml"
 	else
@@ -124,8 +132,9 @@ mynh_system_user_create
 
 if [ "$upgrade_type" == "UPGRADE_APP" ]
 then
-	ynh_script_progression --message="Installing Home Assistant in a virtual environment..."
+	ynh_script_progression --message="Upgrading source files..."
 	
+	myynh_install_python --python="$py_required_version"
 	ynh_exec_fully_quiet myynh_install_homeassistant
 fi
 
@@ -141,7 +150,7 @@ ynh_add_nginx_config
 #=================================================
 ynh_script_progression --message="Upgrading dependencies..."
 
-myynh_install_dependencies --python="$PY_REQUIRED_VERSION"
+ynh_install_app_dependencies $pkg_dependencies
 
 #=================================================
 # UPDATE A CONFIG FILE
@@ -180,7 +189,7 @@ myynh_set_permissions
 #=================================================
 ynh_script_progression --message="Integrating service in YunoHost..."
 
-yunohost service add "$app" --description="Home Assistant server" --log="$log_file" --needs_exposed_ports=$port
+yunohost service add $app --description="Home Assistant server" --log="$log_file" --needs_exposed_ports=$port
 
 #=================================================
 # START SYSTEMD SERVICE
@@ -188,13 +197,13 @@ yunohost service add "$app" --description="Home Assistant server" --log="$log_fi
 ynh_script_progression --message="Starting a systemd service..."
 
 # start systemd service with --verbose 
-ynh_systemd_action --service_name="$app" --action=start --line_match="Home Assistant initialized" --log_path="$log_file" --timeout=3600
+ynh_systemd_action --service_name=$app --action=start --line_match="Home Assistant initialized" --log_path="$log_file" --timeout=3600
 
 # remove --verbose from service
 ynh_replace_string --match_string=" --verbose" --replace_string="" --target_file="/etc/systemd/system/$app.service"
 ynh_store_file_checksum --file="/etc/systemd/system/$app.service"
 systemctl daemon-reload
-ynh_systemd_action --service_name="$app" --action=restart
+ynh_systemd_action --service_name=$app --action=restart
 
 #=================================================
 # RELOAD NGINX