diff --git a/.gitignore b/.gitignore
index 7bbc71c..ac45474 100644
--- a/.gitignore
+++ b/.gitignore
@@ -99,3 +99,6 @@ ENV/
 
 # mypy
 .mypy_cache/
+*~
+*.sw[op]
+.DS_Store
diff --git a/manifest.toml b/manifest.toml
index 53c8cc7..fff5e89 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -23,6 +23,7 @@ fund = "https://weblate.org/fr/donate/"
 
 [integration]
 yunohost = ">= 12.0.0"
+helpers_version = "2.1"
 architectures = "all"
 multi_instance = true
 ldap = false
@@ -86,6 +87,7 @@ ram.runtime = "3G"
     [resources.system_user]
 
     [resources.install_dir]
+    group = "www-data:r-x"
 
     [resources.permissions]
     main.url = "/"
diff --git a/scripts/_common.sh b/scripts/_common.sh
index c5f9ef0..5e9b55a 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 #=================================================
-# COMMON VARIABLES
+# COMMON VARIABLES AND CUSTOM HELPERS
 #=================================================
 
 debian_maj_version=$(sed 's/\..*//' /etc/debian_version)
@@ -16,10 +16,6 @@ elif [ "$debian_maj_version" -eq 12 ] ; then
     weblate_pypath="python3.11"
 fi
 
-#=================================================
-# PERSONAL HELPERS
-#=================================================
-
 set_forge_variables() {
 	if [ $used_forge = "GitHub" ] ; then
 		github_username="$forge_username"
@@ -33,11 +29,3 @@ set_forge_variables() {
 		gitlab_token="$forge_token"
 	fi
 }
-
-#=================================================
-# EXPERIMENTAL HELPERS
-#=================================================
-
-#=================================================
-# FUTURE OFFICIAL HELPERS
-#=================================================
diff --git a/scripts/backup b/scripts/backup
index dbbe2a8..7899510 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -1,62 +1,38 @@
 #!/bin/bash
 
-#=================================================
-# GENERIC START
-#=================================================
-# IMPORT GENERIC HELPERS
-#=================================================
-
-# Keep this path for calling _common.sh inside the execution's context of backup and restore scripts
 source ../settings/scripts/_common.sh
 source /usr/share/yunohost/helpers
 
-#=================================================
-# DECLARE DATA AND CONF FILES TO BACKUP
-#=================================================
-ynh_print_info --message="Declaring files to be backed up..."
+ynh_print_info "Declaring files to be backed up..."
 
 #=================================================
 # BACKUP THE APP MAIN DIR
 #=================================================
 
-ynh_backup --src_path="$install_dir"
+ynh_backup "$install_dir"
 
 #=================================================
-# BACKUP THE NGINX CONFIGURATION
+# SYSTEM CONFIGURATION
 #=================================================
 
-ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"
+ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf"
 
-#=================================================
-# SPECIFIC BACKUP
-#=================================================
-# BACKUP LOGROTATE
-#=================================================
+ynh_backup "/etc/logrotate.d/$app"
 
-ynh_backup --src_path="/etc/logrotate.d/$app"
+ynh_backup "/etc/systemd/system/$app.service"
+ynh_backup "/etc/systemd/system/$app-celery.service"
 
-#=================================================
-# BACKUP SYSTEMD
-#=================================================
-
-ynh_backup --src_path="/etc/systemd/system/$app.service"
-ynh_backup --src_path="/etc/systemd/system/$app-celery.service"
-
-#=================================================
-# BACKUP VARIOUS FILES
-#=================================================
-
-ynh_backup --src_path="/etc/uwsgi/apps-available/$app.ini"
+ynh_backup "/etc/uwsgi/apps-available/$app.ini"
 
 #=================================================
 # BACKUP THE POSTGRESQL DATABASE
 #=================================================
-ynh_print_info --message="Backing up the PostgreSQL database..."
+ynh_print_info "Backing up the PostgreSQL database..."
 
-ynh_psql_dump_db --database="$db_name" > db.sql
+ynh_psql_dump_db > db.sql
 
 #=================================================
 # END OF SCRIPT
 #=================================================
 
-ynh_print_info --message="Backup script completed for $app. (YunoHost will then actually copy those files to the archive)."
+ynh_print_info "Backup script completed for $app. (YunoHost will then actually copy those files to the archive)."
diff --git a/scripts/change_url b/scripts/change_url
index 5a4d779..edda15b 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -1,87 +1,75 @@
 #!/bin/bash
 
-#=================================================
-# GENERIC STARTING
-#=================================================
-# IMPORT GENERIC HELPERS
-#=================================================
-
 source _common.sh
 source /usr/share/yunohost/helpers
 
-#=================================================
-# STANDARD MODIFICATIONS
 #=================================================
 # STOP SYSTEMD SERVICE
 #=================================================
-ynh_script_progression --message="Stopping systemd services..." --weight=1
+ynh_script_progression "Stopping systemd services..."
 
-ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/weblate.log" --line_match="goodbye to uWSGI"
-ynh_systemd_action --service_name="$app-celery" --action="stop" --log_path="systemd"
+ynh_systemctl --service=$app --action="stop" --log_path="/var/log/$app/weblate.log" --wait_until="goodbye to uWSGI"
+ynh_systemctl --service="$app-celery" --action="stop" --log_path="systemd"
 
 #=================================================
 # MODIFY URL IN NGINX CONF
 #=================================================
-ynh_script_progression --message="Updating NGINX web server configuration..." --weight=1
+ynh_script_progression "Updating NGINX web server configuration..."
 
-ynh_change_url_nginx_config
+ynh_config_change_url_nginx
 
-#=================================================
-# SPECIFIC MODIFICATIONS
 #=================================================
 # MODIFY SETTINGS
 #=================================================
-ynh_script_progression --message="Modify weblate's config file..." --weight=1
+ynh_script_progression "Modify weblate's config file..."
 
 settings="$install_dir/venv/lib/$weblate_pypath/site-packages/weblate/settings.py"
-ynh_backup_if_checksum_is_different --file="$settings"
+ynh_backup_if_checksum_is_different "$settings"
 
 # Change the path in the nginx config file
 if [ $change_path -eq 1 ]
 then
-	ynh_replace_string --match_string="URL_PREFIX = \"${old_path%/}\"" --replace_string="URL_PREFIX = \"${new_path%/}\"" --target_file="$settings"
+	ynh_replace --match="URL_PREFIX = \"${old_path%/}\"" --replace="URL_PREFIX = \"${new_path%/}\"" --file="$settings"
 fi
 
 # Change the domain for nginx
 if [ $change_domain -eq 1 ]
 then
 	# replace SERVER_EMAIL
-	ynh_replace_string --match_string="noreply@$old_domain" --replace_string="noreply@$new_domain" --target_file="$settings"
+	ynh_replace --match="noreply@$old_domain" --replace="noreply@$new_domain" --file="$settings"
 	# replace SITE_DOMAIN
-	ynh_replace_string --match_string="SITE_DOMAIN = \"$old_domain\"" --replace_string="SITE_DOMAIN = \"$new_domain\"" --target_file="$settings"
+	ynh_replace --match="SITE_DOMAIN = \"$old_domain\"" --replace="SITE_DOMAIN = \"$new_domain\"" --file="$settings"
 	# replace ALLOWED_HOSTS
-	ynh_replace_string --match_string="ALLOWED_HOSTS = \[\"$old_domain\"\]" --replace_string="ALLOWED_HOSTS = \[\"$new_domain\"\]" --target_file="$settings"
+	ynh_replace --match="ALLOWED_HOSTS = \[\"$old_domain\"\]" --replace="ALLOWED_HOSTS = \[\"$new_domain\"\]" --file="$settings"
 fi
 
-ynh_store_file_checksum --file="$settings"
+ynh_store_file_checksum "$settings"
 
 #=================================================
 # MODIFY UWSGI
 #=================================================
 
 finaluwsgiini="/etc/uwsgi/apps-available/$app.ini"
-ynh_backup_if_checksum_is_different --file="$finaluwsgiini"
+ynh_backup_if_checksum_is_different "$finaluwsgiini"
 
 # Change the path in the nginx config file
 if [ $change_path -eq 1 ]
 then
-	ynh_replace_string --match_string="mount = $old_path=" --replace_string="mount = $new_path=" --target_file="$finaluwsgiini"
+	ynh_replace --match="mount = $old_path=" --replace="mount = $new_path=" --file="$finaluwsgiini"
 fi
 
-ynh_store_file_checksum --file="$finaluwsgiini"
+ynh_store_file_checksum "$finaluwsgiini"
 
-#=================================================
-# GENERIC FINALISATION
 #=================================================
 # START SYSTEMD SERVICE
 #=================================================
-ynh_script_progression --message="Starting a systemd service..." --weight=5
+ynh_script_progression "Starting $app's systemd service..."
 
-ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/weblate.log" --line_match="spawned uWSGI"
-ynh_systemd_action --service_name="$app-celery" --action="start" --log_path="/var/log/$app/weblate-celery-celery.log" --line_match="mingle: all alone"
+ynh_systemctl --service=$app --action="start" --log_path="/var/log/$app/weblate.log" --wait_until="spawned uWSGI"
+ynh_systemctl --service="$app-celery" --action="start" --log_path="/var/log/$app/weblate-celery-celery.log" --wait_until="mingle: all alone"
 
 #=================================================
 # END OF SCRIPT
 #=================================================
 
-ynh_script_progression --message="Change of URL completed for $app" --last
+ynh_script_progression "Change of URL completed for $app"
diff --git a/scripts/install b/scripts/install
index 4e13e85..3c5014b 100755
--- a/scripts/install
+++ b/scripts/install
@@ -1,11 +1,5 @@
 #!/bin/bash
 
-#=================================================
-# GENERIC START
-#=================================================
-# IMPORT GENERIC HELPERS
-#=================================================
-
 source _common.sh
 source /usr/share/yunohost/helpers
 
@@ -19,11 +13,11 @@ key=$(ynh_string_random --length=50)
 #=================================================
 # STORE SETTINGS FROM MANIFEST
 #=================================================
-ynh_script_progression --message="Storing installation settings..." --weight=1
+ynh_script_progression "Storing installation settings..."
 
-ynh_app_setting_set --app=$app --key=used_forge --value=$used_forge
-ynh_app_setting_set --app=$app --key=forge_username --value=$forge_username
-ynh_app_setting_set --app=$app --key=forge_token --value=$forge_token
+ynh_app_setting_set --key=used_forge --value=$used_forge
+ynh_app_setting_set --key=forge_username --value=$forge_username
+ynh_app_setting_set --key=forge_token --value=$forge_token
 
 # Remove trailing "/" from the path
 path_no_slash=${path%/}
@@ -31,14 +25,14 @@ path_no_slash=${path%/}
 #=================================================
 # CREATE A POSTGRESQL DATABASE
 #=================================================
-ynh_script_progression --message="Creating a PostgreSQL database..." --weight=2
+ynh_script_progression "Creating a PostgreSQL database..."
 
-ynh_psql_execute_as_root --sql="CREATE EXTENSION IF NOT EXISTS pg_trgm;" --database=$db_name
+ynh_psql_db_shell <<< "CREATE EXTENSION IF NOT EXISTS pg_trgm;"
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
-ynh_script_progression --message="Setting up source files..."
+ynh_script_progression "Setting up source files..."
 
 mkdir -p "$install_dir/avatar-cache"
 mkdir -p "$install_dir/data"
@@ -50,17 +44,14 @@ chown -R $app:www-data "$install_dir"
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
-ynh_script_progression --message="Configuring NGINX web server..." --weight=2
+ynh_script_progression "Configuring NGINX web server..."
 
-# Create a dedicated NGINX config
-ynh_add_nginx_config
+ynh_config_add_nginx
 
-#=================================================
-# SPECIFIC SETUP
 #=================================================
 # INSTALL XXHASH
 #=================================================
-ynh_script_progression --message="Installing xxHash..."
+ynh_script_progression "Installing xxHash..."
 
 tempdir="$(mktemp -d)"
 ynh_setup_source --dest_dir=$tempdir --source_id="libxxhash"
@@ -68,17 +59,17 @@ pushd $tempdir
 	make
 	make install
 popd
-ynh_secure_remove --file="$tempdir"
+ynh_safe_rm "$tempdir"
 
 #=================================================
 # CONFIGURE HUB
 #=================================================
 
 if [ $used_forge = "GitHub" ] ; then
-	ynh_script_progression --message="Configure hub..." --weight=1
-	
+	ynh_script_progression "Configure hub..."
+
 	mkdir "$install_dir/.config/"
-	ynh_add_config --template="../conf/hub_config" --destination="$install_dir/.config/hub"
+	ynh_config_add --template="hub_config" --destination="$install_dir/.config/hub"
 
 	cat <<EOF > "$install_dir/.bashrc"
 	eval "$(hub alias -s /bin/bash)"
@@ -88,11 +79,10 @@ fi
 #=================================================
 # PIP INSTALLATION
 #=================================================
-ynh_script_progression --message="Install weblate using PIP..." --weight=80
+ynh_script_progression "Install weblate using PIP..."
 
 virtualenv --python=python3 "${install_dir}/venv"
 chown -R $app: "$install_dir"
-
 #run source in a 'sub shell'
 (
 	set +o nounset
@@ -116,17 +106,17 @@ chown -R $app: "$install_dir"
 #=================================================
 # ADD A CONFIGURATION
 #=================================================
-ynh_script_progression --message="Adding a configuration file..." --weight=1
+ynh_script_progression "Adding $app's configuration..."
 
 redis_db=$(ynh_redis_get_free_db)
-ynh_app_setting_set --app=$app --key=redis_db --value="$redis_db"
+ynh_app_setting_set --key=redis_db --value="$redis_db"
 settings="$install_dir/venv/lib/$weblate_pypath/site-packages/weblate/settings.py"
 
 set_forge_variables
 
-ynh_add_config --template="../conf/settings.py" --destination="$settings"
-ynh_add_config --template="../conf/celery-weblate" --destination="$install_dir/celery-weblate"
-ynh_add_config --template="../conf/uwsgi.ini" --destination="/etc/uwsgi/apps-available/$app.ini"
+ynh_config_add --template="settings.py" --destination="$settings"
+ynh_config_add --template="celery-weblate" --destination="$install_dir/celery-weblate"
+ynh_config_add --template="uwsgi.ini" --destination="/etc/uwsgi/apps-available/$app.ini"
 
 touch "$install_dir/local_settings.py"
 ln -sf "$install_dir/local_settings.py" "$install_dir/venv/lib/$weblate_pypath/site-packages/weblate/local_settings.py"
@@ -142,7 +132,7 @@ chown -R "$app:www-data" "$install_dir/data"
 # SPECIFIC SETUP Filling up the database
 # https://docs.weblate.org/en/latest/admin/install.html#filling-up-the-database
 #==========================================
-ynh_script_progression --message="Filling up the database..." --weight=10
+ynh_script_progression "Filling up the database..."
 
 (
 	set +o nounset
@@ -152,46 +142,44 @@ ynh_script_progression --message="Filling up the database..." --weight=10
 	cd "${install_dir}"
 
 	# the user needs to be weblate for postgresql
-	ynh_exec_warn_less sudo --user=$app $install_dir/venv/bin/weblate migrate --noinput
-	
-	ynh_exec_warn_less sudo --user=$app $install_dir/venv/bin/weblate createadmin --no-color \
+	ynh_hide_warnings sudo --user=$app $install_dir/venv/bin/weblate migrate --noinput
+
+	ynh_hide_warnings sudo --user=$app $install_dir/venv/bin/weblate createadmin --no-color \
 		--password "$password" \
 		--username "$admin" \
 		--email "$admin_mail"
 
 	# generate static files
-	ynh_exec_warn_less sudo --user=$app $install_dir/venv/bin/weblate collectstatic --noinput
+	ynh_hide_warnings sudo --user=$app $install_dir/venv/bin/weblate collectstatic --noinput
 
 	# https://docs.weblate.org/en/latest/admin/install/venv-debian.html
-	ynh_exec_warn_less sudo --user=$app $install_dir/venv/bin/weblate compress
+	ynh_hide_warnings sudo --user=$app $install_dir/venv/bin/weblate compress
 
 	# Check the configuration
 	# This may fail in some cases with errors, etc., but the app works and the user can fix issues later.
-	ynh_exec_warn_less sudo --user=$app $install_dir/venv/bin/weblate check --deploy || true
+	ynh_hide_warnings sudo --user=$app $install_dir/venv/bin/weblate check --deploy || true
 )
 
 #=================================================
 # SETUP SYSTEMD
 #=================================================
-ynh_script_progression --message="Configuring a systemd service..." --weight=3
+ynh_script_progression "Configuring $app's systemd service..."
 
-ynh_add_systemd_config --service=$app --template="weblate.service"
-ynh_add_systemd_config --service="$app-celery" --template="celery-weblate.service"
+ynh_config_add_systemd  --template="weblate.service"
+ynh_config_add_systemd --service="$app-celery" --template="celery-weblate.service"
 
-#=================================================
-# GENERIC FINALIZATION
 #=================================================
 # SETUP LOGROTATE
 #=================================================
-ynh_script_progression --message="Configuring log rotation..." --weight=1
+ynh_script_progression "Configuring log rotation..."
 
 # Use logrotate to manage application logfile(s)
-ynh_use_logrotate --non-append
+ynh_config_add_logrotate
 
 #=================================================
 # INTEGRATE SERVICE IN YUNOHOST
 #=================================================
-ynh_script_progression --message="Integrating service in YunoHost..." --weight=3
+ynh_script_progression "Integrating service in YunoHost..."
 
 yunohost service add $app --log="/var/log/$app/weblate.log"
 yunohost service add "$app-celery" --log="/var/log/$app/weblate-celery-w1.log"
@@ -199,13 +187,13 @@ yunohost service add "$app-celery" --log="/var/log/$app/weblate-celery-w1.log"
 #=================================================
 # START SYSTEMD SERVICE
 #=================================================
-ynh_script_progression --message="Starting a systemd service..." --weight=5
+ynh_script_progression "Starting $app's systemd service..."
 
-ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/weblate.log" --line_match="spawned uWSGI"
-ynh_systemd_action --service_name="$app-celery" --action="start" --log_path="/var/log/$app/weblate-celery-celery.log" --line_match="mingle: all alone"
+ynh_systemctl --service=$app --action="start" --log_path="/var/log/$app/weblate.log" --wait_until="spawned uWSGI"
+ynh_systemctl --service="$app-celery" --action="start" --log_path="/var/log/$app/weblate-celery-celery.log" --wait_until="mingle: all alone"
 
 #=================================================
 # END OF SCRIPT
 #=================================================
 
-ynh_script_progression --message="Installation of $app completed" --last
+ynh_script_progression "Installation of $app completed"
diff --git a/scripts/remove b/scripts/remove
index f6d4bd6..fed424e 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -1,63 +1,33 @@
 #!/bin/bash
 
-#=================================================
-# GENERIC START
-#=================================================
-# IMPORT GENERIC HELPERS
-#=================================================
-
 source _common.sh
 source /usr/share/yunohost/helpers
 
 #=================================================
-# STANDARD REMOVE
-#=================================================
-# REMOVE SERVICE INTEGRATION IN YUNOHOST
+# REMOVE SYSTEM CONFIGURATIONS
 #=================================================
+ynh_script_progression "Removing system configurations related to $app..."
 
-# Remove the service from the list of services known by YunoHost (added from `yunohost service add`)
-if ynh_exec_warn_less yunohost service status $app >/dev/null
-then
-	ynh_script_progression --message="Removing $app service integration..." --weight=1
+if ynh_hide_warnings yunohost service status $app >/dev/null; then
 	yunohost service remove $app
 fi
 
-# Remove the service from the list of services known by YunoHost (added from `yunohost service add`)
-if ynh_exec_warn_less yunohost service status "$app-celery" >/dev/null
-then
-	ynh_script_progression --message="Removing $app-celery service integration..." --weight=1
+if ynh_hide_warnings yunohost service status "$app-celery" >/dev/null; then
 	yunohost service remove "$app-celery"
 fi
 
-#=================================================
-# STOP AND REMOVE SERVICE
-#=================================================
-ynh_script_progression --message="Stopping and removing the systemd service..." --weight=5
+ynh_config_remove_systemd
 
-# Remove the dedicated systemd config
-ynh_remove_systemd_config --service=$app
-ynh_remove_systemd_config --service="$app-celery"
+ynh_config_remove_systemd"$app-celery"
 
-#=================================================
-# REMOVE LOGROTATE CONFIGURATION
-#=================================================
-ynh_script_progression --message="Removing logrotate configuration..." --weight=1
+ynh_config_remove_logrotate
 
-# Remove the app-specific logrotate config
-ynh_remove_logrotate
-
-#=================================================
-# REMOVE NGINX CONFIGURATION
-#=================================================
-ynh_script_progression --message="Removing NGINX web server configuration..." --weight=1
-
-# Remove the dedicated NGINX config
-ynh_remove_nginx_config
+ynh_config_remove_nginx
 
 #=================================================
 # REMOVE XXHASH
 #=================================================
-ynh_script_progression --message="Removing xxHash..."
+ynh_script_progression "Removing xxHash..."
 
 tempdir="$(mktemp -d)"
 ynh_setup_source --dest_dir=$tempdir --source_id="libxxhash"
@@ -65,18 +35,16 @@ pushd $tempdir
 	make
 	make uninstall
 popd
-ynh_secure_remove --file="$tempdir"
+ynh_safe_rm "$tempdir"
 
-#=================================================
-# SPECIFIC REMOVE
 #=================================================
 # REMOVE VARIOUS FILES
 #=================================================
-ynh_script_progression --message="Removing various files..."
+ynh_script_progression "Removing various files..."
 
-ynh_secure_remove --file="/etc/uwsgi/apps-available/$app.ini"
+ynh_safe_rm "/etc/uwsgi/apps-available/$app.ini"
 
-ynh_secure_remove --file="/var/run/$app-celery"
+ynh_safe_rm "/var/run/$app-celery"
 
 ynh_redis_remove_db
 
@@ -84,4 +52,4 @@ ynh_redis_remove_db
 # END OF SCRIPT
 #=================================================
 
-ynh_script_progression --message="Removal of $app completed" --last
+ynh_script_progression "Removal of $app completed"
diff --git a/scripts/restore b/scripts/restore
index 0263875..2817485 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -1,21 +1,14 @@
 #!/bin/bash
 
-#=================================================
-# GENERIC START
-#=================================================
-# IMPORT GENERIC HELPERS
-#=================================================
-
-# Keep this path for calling _common.sh inside the execution's context of backup and restore scripts
 source ../settings/scripts/_common.sh
 source /usr/share/yunohost/helpers
 
 #=================================================
 # RESTORE THE APP MAIN DIR
 #=================================================
-ynh_script_progression --message="Restoring the app main directory..." --weight=4
+ynh_script_progression "Restoring the app main directory..."
 
-ynh_restore_file --origin_path="$install_dir"
+ynh_restore "$install_dir"
 
 touch "$install_dir/local_settings.py"
 ln -sf "$install_dir/local_settings.py" "$install_dir/venv/lib/$weblate_pypath/site-packages/weblate/local_settings.py"
@@ -29,21 +22,21 @@ chown -R $app:www-data "$install_dir/data"
 #=================================================
 # RESTORE THE NGINX CONFIGURATION
 #=================================================
-ynh_script_progression --message="Restoring the NGINX web server configuration..."
+ynh_script_progression "Restoring the NGINX web server configuration..."
 
-ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"
+ynh_restore "/etc/nginx/conf.d/$domain.d/$app.conf"
 
 #=================================================
 # RESTORE THE POSTGRESQL DATABASE
 #=================================================
-ynh_script_progression --message="Restoring the PostgreSQL database..." --weight=5
+ynh_script_progression "Restoring the PostgreSQL database..."
 
-ynh_psql_connect_as --user=$db_user --password=$db_pwd --database=$db_name < ./db.sql
+ynh_psql_db_shell < ./db.sql
 
 #=================================================
 # INSTALL XXHASH
 #=================================================
-ynh_script_progression --message="Installing xxHash..."
+ynh_script_progression "Installing xxHash..."
 
 tempdir="$(mktemp -d)"
 ynh_setup_source --dest_dir=$tempdir --source_id="libxxhash"
@@ -51,37 +44,37 @@ pushd $tempdir
 	make
 	make install
 popd
-ynh_secure_remove --file="$tempdir"
+ynh_safe_rm "$tempdir"
 
 #=================================================
 # RESTORE VARIOUS FILES
 #=================================================
-ynh_script_progression --message="Restoring various files..." --weight=1
+ynh_script_progression "Restoring various files..."
 
-ynh_restore_file --origin_path="/etc/uwsgi/apps-available/$app.ini"
+ynh_restore "/etc/uwsgi/apps-available/$app.ini"
 
 #=================================================
 # RESTORE SYSTEMD
 #=================================================
-ynh_script_progression --message="Restoring the systemd configuration..." --weight=4
+ynh_script_progression "Restoring $app's systemd service..."
 
-ynh_restore_file --origin_path="/etc/systemd/system/$app.service"
+ynh_restore "/etc/systemd/system/$app.service"
 systemctl enable $app.service --quiet
-ynh_restore_file  --origin_path="/etc/systemd/system/$app-celery.service"
+ynh_restore  "/etc/systemd/system/$app-celery.service"
 systemctl enable "$app-celery" --quiet
 
 #=================================================
 # RESTORE THE LOGROTATE CONFIGURATION
 #=================================================
-ynh_script_progression --message="Restoring the logrotate configuration..."
+ynh_script_progression "Restoring the logrotate configuration..."
 
 mkdir -p "/var/log/$app"
-ynh_restore_file --origin_path="/etc/logrotate.d/$app"
+ynh_restore "/etc/logrotate.d/$app"
 
 #=================================================
 # INTEGRATE SERVICE IN YUNOHOST
 #=================================================
-ynh_script_progression --message="Integrating service in YunoHost..." --weight=3
+ynh_script_progression "Integrating service in YunoHost..."
 
 yunohost service add $app --log="/var/log/$app/weblate.log"
 yunohost service add "$app-celery" --log="/var/log/$app/weblate-celery-w1.log"
@@ -89,22 +82,20 @@ yunohost service add "$app-celery" --log="/var/log/$app/weblate-celery-w1.log"
 #=================================================
 # START SYSTEMD SERVICE
 #=================================================
-ynh_script_progression --message="Starting a systemd service..." --weight=5
+ynh_script_progression "Starting $app's systemd service..."
 
-ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/weblate.log" --line_match="spawned uWSGI"
-ynh_systemd_action --service_name="$app-celery" --action="start" --log_path="/var/log/$app/weblate-celery-w1.log" --line_match="mingle: all alone"
+ynh_systemctl --service=$app --action="start" --log_path="/var/log/$app/weblate.log" --wait_until="spawned uWSGI"
+ynh_systemctl --service="$app-celery" --action="start" --log_path="/var/log/$app/weblate-celery-w1.log" --wait_until="mingle: all alone"
 
-#=================================================
-# GENERIC FINALIZATION
 #=================================================
 # RELOAD NGINX
 #=================================================
-ynh_script_progression --message="Reloading NGINX web server..." --weight=1
+ynh_script_progression "Reloading NGINX web server..."
 
-ynh_systemd_action --service_name=nginx --action=reload
+ynh_systemctl --service=nginx --action=reload
 
 #=================================================
 # END OF SCRIPT
 #=================================================
 
-ynh_script_progression --message="Restoration completed for $app" --last
+ynh_script_progression "Restoration completed for $app"
diff --git a/scripts/upgrade b/scripts/upgrade
index 6d65747..18afb8a 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -1,18 +1,12 @@
 #!/bin/bash
 
-#=================================================
-# GENERIC START
-#=================================================
-# IMPORT GENERIC HELPERS
-#=================================================
-
 source _common.sh
 source /usr/share/yunohost/helpers
 
 #=================================================
 # LOAD SETTINGS
 #=================================================
-ynh_script_progression --message="Loading installation settings..." --weight=1
+ynh_script_progression "Loading installation settings..."
 
 admin_mail=$(ynh_user_get_info --username="$admin" --key=mail)
 key=$(ynh_string_random --length=50)
@@ -20,51 +14,41 @@ key=$(ynh_string_random --length=50)
 # Remove trailing "/" from the path
 path_no_slash=${path%/}
 
-#=================================================
-# CHECK VERSION
-#=================================================
-
-upgrade_type=$(ynh_check_app_version_changed)
-
-#=================================================
-# STANDARD UPGRADE STEPS
 #=================================================
 # STOP SYSTEMD SERVICE
 #=================================================
-ynh_script_progression --message="Stopping systemd services..." --weight=5
+ynh_script_progression "Stopping systemd services..."
 
-ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/weblate.log" --line_match="goodbye to uWSGI"
-ynh_systemd_action --service_name="$app-celery" --action="stop" --log_path="systemd"
+ynh_systemctl --service=$app --action="stop" --log_path="/var/log/$app/weblate.log" --wait_until="goodbye to uWSGI"
+ynh_systemctl --service="$app-celery" --action="stop" --log_path="systemd"
 
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================
-ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
+ynh_script_progression "Ensuring downward compatibility..."
 
 # If used_forge, forge_username, forge_token don't exist, create them
 if [ -z "$used_forge" ]; then
 	used_forge="GitHub"
-	forge_username=$(ynh_app_setting_get --app=$app --key=github_account)
-	forge_token=$(ynh_app_setting_get --app=$app --key=github_token)
-	ynh_app_setting_set --app=$app --key=used_forge --value=$used_forge
-	ynh_app_setting_set --app=$app --key=forge_username --value=$forge_username
-	ynh_app_setting_set --app=$app --key=forge_token --value=$forge_token
+	forge_username=$(ynh_app_setting_get --key=github_account)
+	forge_token=$(ynh_app_setting_get --key=github_token)
+	ynh_app_setting_set --key=used_forge --value=$used_forge
+	ynh_app_setting_set --key=forge_username --value=$forge_username
+	ynh_app_setting_set --key=forge_token --value=$forge_token
 fi
 
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
-ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=3
+ynh_script_progression "Upgrading NGINX web server configuration..."
 
 # Create a dedicated NGINX config
-ynh_add_nginx_config
+ynh_config_add_nginx
 
-#=================================================
-# SPECIFIC UPGRADE
 #=================================================
 # INSTALL XXHASH
 #=================================================
-ynh_script_progression --message="Installing xxHash..."
+ynh_script_progression "Installing xxHash..."
 
 tempdir="$(mktemp -d)"
 ynh_setup_source --dest_dir=$tempdir --source_id="libxxhash"
@@ -72,17 +56,17 @@ pushd $tempdir
 	make
 	make install
 popd
-ynh_secure_remove --file="$tempdir"
+ynh_safe_rm "$tempdir"
 
 #=================================================
 # CONFIGURE HUB
 #=================================================
 
 if [ $used_forge = "GitHub" ] ; then
-	ynh_script_progression --message="Configure hub..." --weight=1
-	
+	ynh_script_progression "Configure hub..."
+
 	#mkdir "$install_dir/.config/"
-	ynh_add_config --template="../conf/hub_config" --destination="$install_dir/.config/hub"
+	ynh_config_add --template="hub_config" --destination="$install_dir/.config/hub"
 
 	cat <<EOF > "$install_dir/.bashrc"
 	eval "$(hub alias -s /bin/bash)"
@@ -92,19 +76,19 @@ fi
 #=================================================
 # UPDATE A CONFIG FILE
 #=================================================
-ynh_script_progression --message="Updating a configuration file..." --weight=2
+ynh_script_progression "Updating configuration..."
 
-ynh_add_config --template="../conf/uwsgi.ini" --destination="/etc/uwsgi/apps-available/$app.ini"
+ynh_config_add --template="uwsgi.ini" --destination="/etc/uwsgi/apps-available/$app.ini"
 
-ynh_add_config --template="../conf/celery-weblate" --destination="$install_dir/celery-weblate"
+ynh_config_add --template="celery-weblate" --destination="$install_dir/celery-weblate"
 
 #=================================================
 # SETUP SYSTEMD
 #=================================================
-ynh_script_progression --message="Configuring a systemd service..." --weight=3
+ynh_script_progression "Configuring $app's systemd service..."
 
-ynh_add_systemd_config --service=$app --template="weblate.service"
-ynh_add_systemd_config --service="$app-celery" --template="celery-weblate.service"
+ynh_config_add_systemd  --template="weblate.service"
+ynh_config_add_systemd --service="$app-celery" --template="celery-weblate.service"
 
 #=================================================
 # UPGRADE WEBLATE
@@ -116,12 +100,11 @@ upgrade() {
 	#=================================================
 	# PIP INSTALLATION
 	#=================================================
-	ynh_script_progression --message="Install weblate using PIP..." --weight=15
+	ynh_script_progression "Install weblate using PIP..."
 
-	ynh_secure_remove --file="${install_dir}/venv"
+	ynh_safe_rm "${install_dir}/venv"
 	virtualenv --python=python3 "${install_dir}/venv"
 	chown -R $app: "$install_dir"
-
 	#run source in a 'sub shell'
 	(
 		set +o nounset
@@ -144,19 +127,20 @@ upgrade() {
 	#=================================================
 	# MODIFY A CONFIG FILE
 	#=================================================
-	ynh_script_progression --message="Create weblate configuration file..." --weight=2
+	ynh_script_progression "Create weblate configuration file..."
+
 	# save old settings file
 	settings="$install_dir/venv/lib/$weblate_pypath/site-packages/weblate/settings.py"
 	path="${path%/}"
 
 	set_forge_variables
 
-	ynh_add_config --template="../conf/settings.py" --destination="$settings"
+	ynh_config_add --template="settings.py" --destination="$settings"
 
-	ynh_app_setting_set --app=$app --key=redis_db --value="$redis_db"
+	ynh_app_setting_set --key=redis_db --value="$redis_db"
 
 	# Recalculate and store the config file checksum into the app settings
-	ynh_store_file_checksum --file="$settings"
+	ynh_store_file_checksum "$settings"
 
 	touch "$install_dir/local_settings.py"
 	ln -sf "$install_dir/local_settings.py" "$install_dir/venv/lib/$weblate_pypath/site-packages/weblate/local_settings.py"
@@ -164,9 +148,9 @@ upgrade() {
 	#=================================================
 	# MIGRATE WEBLATE
 	#=================================================
-	ynh_script_progression --message="Run migration scripts..." --weight=10
+	ynh_script_progression "Run migration scripts..."
 
-	ynh_systemd_action --service_name="$app-celery" --action="start"
+	ynh_systemctl --service="$app-celery" --action="start"
 
 	(
 		set +o nounset
@@ -189,7 +173,7 @@ upgrade() {
 		fi
 	)
 
-	ynh_systemd_action --service_name="$app-celery" --action="stop"
+	ynh_systemctl --service="$app-celery" --action="stop"
 }
 
 file_version="${install_dir}/venv/lib/$weblate_pypath/site-packages/weblate/__init__.py"
@@ -205,7 +189,7 @@ else
 	current_version=3
 fi
 
-ynh_psql_execute_as_root --sql="CREATE EXTENSION IF NOT EXISTS pg_trgm;" --database=$db_name
+ynh_psql_db_shell <<< "CREATE EXTENSION IF NOT EXISTS pg_trgm;"
 
 if [ "$current_version" -lt "5" ]
 then
@@ -223,20 +207,18 @@ chown -R "$app:www-data" "$install_dir/data"
 chmod 750 "$install_dir"
 chmod -R o-rwx "$install_dir"
 
-#=================================================
-# GENERIC FINALIZATION
 #=================================================
 # SETUP LOGROTATE
 #=================================================
-ynh_script_progression --message="Upgrading logrotate configuration..." --weight=1
+ynh_script_progression "Upgrading logrotate configuration..."
 
 # Use logrotate to manage app-specific logfile(s)
-ynh_use_logrotate --non-append
+ynh_config_add_logrotate
 
 #=================================================
 # INTEGRATE SERVICE IN YUNOHOST
 #=================================================
-ynh_script_progression --message="Integrating service in YunoHost..." --weight=2
+ynh_script_progression "Integrating service in YunoHost..."
 
 yunohost service add $app --log="/var/log/$app/weblate.log"
 yunohost service add "$app-celery" --log="/var/log/$app/weblate-celery-w1.log"
@@ -244,13 +226,13 @@ yunohost service add "$app-celery" --log="/var/log/$app/weblate-celery-w1.log"
 #=================================================
 # START SYSTEMD SERVICES
 #=================================================
-ynh_script_progression --message="Starting systemd services..." --weight=5
+ynh_script_progression "Starting systemd services..."
 
-ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/weblate.log" --line_match="spawned uWSGI"
-ynh_systemd_action --service_name="$app-celery" --action="start" --log_path="/var/log/$app/weblate-celery-celery.log" --line_match="mingle: all alone"
+ynh_systemctl --service=$app --action="start" --log_path="/var/log/$app/weblate.log" --wait_until="spawned uWSGI"
+ynh_systemctl --service="$app-celery" --action="start" --log_path="/var/log/$app/weblate-celery-celery.log" --wait_until="mingle: all alone"
 
 #=================================================
 # END OF SCRIPT
 #=================================================
 
-ynh_script_progression --message="Upgrade of $app completed" --last
+ynh_script_progression "Upgrade of $app completed"