diff --git a/.gitignore b/.gitignore
index 783a4ae..8f144f3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 *~
 *.sw[op]
+.DS_Store
diff --git a/manifest.toml b/manifest.toml
index 71b4872..33b67c4 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -17,7 +17,8 @@ admindoc = "https://www.elastic.co/guide/en/elasticsearch/reference/8.11/elastic
 code = "https://github.com/elastic/elasticsearch"
 
 [integration]
-yunohost = ">= 11.2"
+yunohost = ">= 11.2.18"
+helpers_version = "2.1"
 architectures = ["amd64", "arm64"]
 multi_instance = true
 
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 944a65e..3d7f008 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -1,17 +1,5 @@
 #!/bin/bash
 
 #=================================================
-# COMMON VARIABLES
-#=================================================
-
-#=================================================
-# PERSONAL HELPERS
-#=================================================
-
-#=================================================
-# EXPERIMENTAL HELPERS
-#=================================================
-
-#=================================================
-# FUTURE OFFICIAL HELPERS
+# COMMON VARIABLES AND CUSTOM HELPERS
 #=================================================
diff --git a/scripts/backup b/scripts/backup
index c6be9d6..7b1183e 100755
--- a/scripts/backup
+++ b/scripts/backup
@@ -1,31 +1,22 @@
 #!/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 DATA DIR
 #=================================================
 
-ynh_backup --src_path="$data_dir" --is_big
+ynh_backup "$data_dir"
 
 #=================================================
 # SPECIFIC BACKUP
@@ -33,22 +24,22 @@ ynh_backup --src_path="$data_dir" --is_big
 # BACKUP LOGROTATE
 #=================================================
 
-ynh_backup --src_path="/etc/logrotate.d/$app"
+ynh_backup "/etc/logrotate.d/$app"
 
 #=================================================
 # BACKUP VARIOUS FILES
 #=================================================
 
-ynh_backup --src_path="/etc/sysctl.d/90-max_map_count-elasticsearch.conf"
+ynh_backup "/etc/sysctl.d/90-max_map_count-elasticsearch.conf"
 
 #=================================================
 # BACKUP SYSTEMD
 #=================================================
 
-ynh_backup --src_path="/etc/systemd/system/$app.service"
+ynh_backup "/etc/systemd/system/$app.service"
 
 #=================================================
 # 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/config b/scripts/config
index 6dbaf67..f4bad92 100644
--- a/scripts/config
+++ b/scripts/config
@@ -8,15 +8,9 @@
 # (validation of several interdependent fields, specific getter/setter for a value,
 # display dynamic informations or choices, pre-loading of config type .cube... ).
 
-#=================================================
-# GENERIC STARTING
-#=================================================
-# IMPORT GENERIC HELPERS
-#=================================================
-
 source /usr/share/yunohost/helpers
 
-ynh_abort_if_errors
+#REMOVEME? ynh_abort_if_errors
 
 #=================================================
 # RETRIEVE ARGUMENTS
@@ -29,11 +23,11 @@ final_path=$(ynh_app_setting_get $app final_path)
 #=================================================
 
 get__xms() {
-    ynh_app_setting_get --app=$app --key=xms
+    ynh_app_setting_get --key=xms
 }
 
 get__xmx() {
-    ynh_app_setting_get --app=$app --key=xmx
+    ynh_app_setting_get --key=xmx
 }
 
 #=================================================
@@ -45,22 +39,20 @@ get__xmx() {
 #=================================================
 
 regenerate_jvm_options() {
-    ynh_add_config --template="jvm.options" --destination="$final_path/config/jvm.options.d/yunohost.options"
+    ynh_config_add --template="jvm.options" --destination="$final_path/config/jvm.options.d/yunohost.options"
     chown $app:$app "$final_path/config/jvm.options.d/yunohost.options"
     chmod 400 "$final_path/config/jvm.options.d/yunohost.options"
 }
 
 set__xms() {
-    ynh_app_setting_set --app=$app --key=xms --value=$xms
+    ynh_app_setting_set --key=xms --value=$xms
     regenerate_jvm_options
 }
 
 set__xmx() {
-    ynh_app_setting_set --app=$app --key=xmx --value=$xmx
+    ynh_app_setting_set --key=xmx --value=$xmx
     regenerate_jvm_options
 }
 
-#=================================================
-# GENERIC FINALIZATION
 #=================================================
 ynh_app_config_run $1
diff --git a/scripts/install b/scripts/install
index add0f20..c40a679 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
 
@@ -16,35 +10,34 @@ source /usr/share/yunohost/helpers
 xms=256m
 xmx=1g
 
-ynh_app_setting_set --app=$app --key=xms --value=$xms
-ynh_app_setting_set --app=$app --key=xmx --value=$xmx
+ynh_app_setting_set --key=xms --value=$xms
+ynh_app_setting_set --key=xmx --value=$xmx
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
-ynh_script_progression --message="Setting up source files..." --weight=15
+ynh_script_progression "Setting up source files..."
 
 # Download, check integrity, uncompress and patch the source from app.src
-ynh_setup_source --dest_dir="$install_dir" 
-
-chmod -R o-rwx "$install_dir"
-chown -R $app:$app "$install_dir"
+ynh_setup_source --dest_dir="$install_dir"
 
+#REMOVEME? Assuming the install dir is setup using ynh_setup_source, the proper chmod/chowns are now already applied and it shouldn't be necessary to tweak perms | chmod -R o-rwx "$install_dir"
+#REMOVEME? Assuming the install dir is setup using ynh_setup_source, the proper chmod/chowns are now already applied and it shouldn't be necessary to tweak perms | chown -R $app:$app "$install_dir"
 #=================================================
 # ADD CONFIGURATIONS
 #=================================================
-ynh_script_progression --message="Adding the configuration files..." --weight=1
+ynh_script_progression "Adding the configuration files..."
 
-ynh_add_config --template="elasticsearch.yml" --destination="$install_dir/config/elasticsearch.yml"
-ynh_add_config --template="jvm.options" --destination="$install_dir/config/jvm.options.d/yunohost.options"
+ynh_config_add --template="elasticsearch.yml" --destination="$install_dir/config/elasticsearch.yml"
+ynh_config_add --template="jvm.options" --destination="$install_dir/config/jvm.options.d/yunohost.options"
 
-chmod 400 "$install_dir/config/elasticsearch.yml" "$install_dir/config/jvm.options.d/yunohost.options"
-chown $app:$app "$install_dir/config/elasticsearch.yml" "$install_dir/config/jvm.options.d/yunohost.options"
+#REMOVEME? Assuming the file is setup using ynh_config_add, the proper chmod/chowns are now already applied and it shouldn't be necessary to tweak perms | chmod 400 "$install_dir/config/elasticsearch.yml" "$install_dir/config/jvm.options.d/yunohost.options"
+#REMOVEME? Assuming the file is setup using ynh_config_add, the proper chmod/chowns are now already applied and it shouldn't be necessary to tweak perms | chown $app:$app "$install_dir/config/elasticsearch.yml" "$install_dir/config/jvm.options.d/yunohost.options"
 
 #=================================================
 # INCREASE MAX_MAP_COUNT
 #=================================================
-ynh_script_progression --message="Increasing maximum map count (sysctl)..."
+ynh_script_progression "Increasing maximum map count (sysctl)..."
 
 # Increase the maximum number of files inotify can monitor.
 cp -a ../conf/90-max_map_count-elasticsearch.conf /etc/sysctl.d/
@@ -57,26 +50,26 @@ fi
 #=================================================
 # SETUP SYSTEMD
 #=================================================
-ynh_script_progression --message="Configuring a systemd service..." --weight=1
+ynh_script_progression "Configuring $app's systemd service..."
 
 # Create a dedicated systemd config
-ynh_add_systemd_config
+ynh_config_add_systemd
 
 # Use logrotate to manage application logfile(s)
-ynh_use_logrotate
+ynh_config_add_logrotate
 
 yunohost service add $app --description="Distributed and RESTful search engine" --log="/var/log/$app/$app.log"
 
 #=================================================
 # START SYSTEMD SERVICE
 #=================================================
-ynh_script_progression --message="Starting a systemd service..." --weight=1
+ynh_script_progression "Starting $app's systemd service..."
 
 # Start a systemd service
-ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"
+ynh_systemctl --service=$app --action="start"
 
 #=================================================
 # 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 c028c2d..3b35c92 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -1,11 +1,5 @@
 #!/bin/bash
 
-#=================================================
-# GENERIC START
-#=================================================
-# IMPORT GENERIC HELPERS
-#=================================================
-
 source _common.sh
 source /usr/share/yunohost/helpers
 
@@ -16,20 +10,20 @@ source /usr/share/yunohost/helpers
 #=================================================
 
 # 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
+if ynh_hide_warnings yunohost service status $app >/dev/null
 then
-	ynh_script_progression --message="Removing $app service integration..." --weight=1
+	ynh_script_progression "Removing $app service integration..."
 	yunohost service remove $app
 fi
 
 # Remove the dedicated systemd config
-ynh_remove_systemd_config
+ynh_config_remove_systemd
 
 # Remove the app-specific logrotate config
-ynh_remove_logrotate
+ynh_config_remove_logrotate
 
 if [ -e "/etc/sysctl.d/90-max_map_count-elasticsearch.conf" ]; then
-	ynh_secure_remove --file="/etc/sysctl.d/90-max_map_count-elasticsearch.conf"
+	ynh_safe_rm "/etc/sysctl.d/90-max_map_count-elasticsearch.conf"
 	# Reload the kernel configuration.
 	if ! [ "${container:-}" = "lxc" ] # lxc doesn't allow sysctl to play with kernel options.
 	then
@@ -41,4 +35,4 @@ fi
 # 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 f262a1e..abd62e5 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -1,11 +1,5 @@
 #!/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
@@ -13,19 +7,18 @@ source /usr/share/yunohost/helpers
 #=================================================
 # RESTORE THE APP MAIN DIR
 #=================================================
-ynh_script_progression --message="Restoring the app main directory..." --weight=1
+ynh_script_progression "Restoring the app main directory..."
 
-ynh_restore_file --origin_path="$install_dir"
-
-chmod -R o-rwx "$install_dir"
-chown -R $app:www-data "$install_dir"
+ynh_restore "$install_dir"
 
+#REMOVEME? Assuming the install dir is setup using ynh_setup_source, the proper chmod/chowns are now already applied and it shouldn't be necessary to tweak perms | chmod -R o-rwx "$install_dir"
+#REMOVEME? Assuming the install dir is setup using ynh_setup_source, the proper chmod/chowns are now already applied and it shouldn't be necessary to tweak perms | chown -R $app:www-data "$install_dir"
 #=================================================
 # RESTORE THE DATA DIRECTORY
 #=================================================
-ynh_script_progression --message="Restoring the data directory..." --weight=1
+ynh_script_progression "Restoring the data directory..."
 
-ynh_restore_file --origin_path="$data_dir" --not_mandatory
+ynh_restore "$data_dir"
 
 chown -R $app:www-data "$data_dir"
 
@@ -34,9 +27,9 @@ chown -R $app:www-data "$data_dir"
 #=================================================
 # RESTORE VARIOUS FILES
 #=================================================
-ynh_script_progression --message="Restoring various files..." --weight=1
+ynh_script_progression "Restoring various files..."
 
-ynh_restore_file --origin_path="/etc/sysctl.d/90-max_map_count-elasticsearch.conf"
+ynh_restore "/etc/sysctl.d/90-max_map_count-elasticsearch.conf"
 if ! [ "${container:-}" = "lxc" ] # lxc doesn't allow sysctl to play with kernel options.
 then
 	sysctl -p /etc/sysctl.d/90-max_map_count-elasticsearch.conf
@@ -45,24 +38,24 @@ fi
 #=================================================
 # RESTORE SYSTEMD
 #=================================================
-ynh_script_progression --message="Restoring the systemd configuration..." --weight=1
+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/logrotate.d/$app"
+ynh_restore "/etc/logrotate.d/$app"
 
 yunohost service add $app --description="Distributed and RESTful search engine" --log="/var/log/$app/$app.log"
 
 #=================================================
 # START SYSTEMD SERVICE
 #=================================================
-ynh_script_progression --message="Starting a systemd service..." --weight=1
+ynh_script_progression "Starting $app's systemd service..."
 
-ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"
+ynh_systemctl --service=$app --action="start"
 
 #=================================================
 # 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 ccc78e5..e1732ae 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -1,66 +1,52 @@
 #!/bin/bash
 
-#=================================================
-# GENERIC START
-#=================================================
-# IMPORT GENERIC HELPERS
-#=================================================
-
 source _common.sh
 source /usr/share/yunohost/helpers
 
-#=================================================
-# CHECK VERSION
-#=================================================
-
-upgrade_type=$(ynh_check_app_version_changed)
-
-#=================================================
-# STANDARD UPGRADE STEPS
 #=================================================
 # STOP SYSTEMD SERVICE
 #=================================================
-ynh_script_progression --message="Stopping a systemd service..." --weight=1
+ynh_script_progression "Stopping $app's systemd service..."
 
-ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/$app.log"
+ynh_systemctl --service=$app --action="stop"
 
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================
-ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
+ynh_script_progression "Ensuring downward compatibility..."
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
 
-if [ "$upgrade_type" == "UPGRADE_APP" ]
+# FIXME: this is still supported but the recommendation is now to *always* re-setup the app sources wether or not the upstream sources changed
+if ynh_app_upstream_version_changed
 then
-	ynh_script_progression --message="Upgrading source files..." --weight=20
+	ynh_script_progression "Upgrading source files..."
 
 	# Download, check integrity, uncompress and patch the source from app.src
 	# The keep option prevents this warning:
 	#   "File .... has been manually modified since the installation or last upgrade."
-	ynh_setup_source --dest_dir="$install_dir" --full_replace=1 --keep="config/elasticsearch.yml"
+	ynh_setup_source --dest_dir="$install_dir" --full_replace --keep="config/elasticsearch.yml"
 fi
 
-chmod -R o-rwx "$install_dir"
-chown -R $app:$app "$install_dir"
-
+#REMOVEME? Assuming the install dir is setup using ynh_setup_source, the proper chmod/chowns are now already applied and it shouldn't be necessary to tweak perms | chmod -R o-rwx "$install_dir"
+#REMOVEME? Assuming the install dir is setup using ynh_setup_source, the proper chmod/chowns are now already applied and it shouldn't be necessary to tweak perms | chown -R $app:$app "$install_dir"
 #=================================================
 # UPDATE A CONFIG FILE
 #=================================================
-ynh_script_progression --message="Updating a configuration file..." --weight=1
+ynh_script_progression "Updating configuration..."
 
-ynh_add_config --template="elasticsearch.yml" --destination="$install_dir/config/elasticsearch.yml"
-ynh_add_config --template="jvm.options" --destination="$install_dir/config/jvm.options.d/yunohost.options"
+ynh_config_add --template="elasticsearch.yml" --destination="$install_dir/config/elasticsearch.yml"
+ynh_config_add --template="jvm.options" --destination="$install_dir/config/jvm.options.d/yunohost.options"
 
-chmod 400 "$install_dir/config/elasticsearch.yml" "$install_dir/config/jvm.options.d/yunohost.options"
-chown $app:$app "$install_dir/config/elasticsearch.yml" "$install_dir/config/jvm.options.d/yunohost.options"
+#REMOVEME? Assuming the file is setup using ynh_config_add, the proper chmod/chowns are now already applied and it shouldn't be necessary to tweak perms | chmod 400 "$install_dir/config/elasticsearch.yml" "$install_dir/config/jvm.options.d/yunohost.options"
+#REMOVEME? Assuming the file is setup using ynh_config_add, the proper chmod/chowns are now already applied and it shouldn't be necessary to tweak perms | chown $app:$app "$install_dir/config/elasticsearch.yml" "$install_dir/config/jvm.options.d/yunohost.options"
 
 #=================================================
 # INCREASE MAX_MAP_COUNT
 #=================================================
-ynh_script_progression --message="Increasing maximum map count (sysctl)..."
+ynh_script_progression "Increasing maximum map count (sysctl)..."
 
 # Increase the maximum number of files inotify can monitor.
 cp -a ../conf/90-max_map_count-elasticsearch.conf /etc/sysctl.d/
@@ -73,25 +59,25 @@ fi
 #=================================================
 # SETUP SYSTEMD
 #=================================================
-ynh_script_progression --message="Upgrading systemd configuration..." --weight=1
+ynh_script_progression "Upgrading systemd configuration..."
 
 # Create a dedicated systemd config
-ynh_add_systemd_config
+ynh_config_add_systemd
 
 # Use logrotate to manage app-specific logfile(s)
-ynh_use_logrotate --non-append
+ynh_config_add_logrotate
 
 yunohost service add $app --description="Distributed and RESTful search engine" --log="/var/log/$app/$app.log"
 
 #=================================================
 # START SYSTEMD SERVICE
 #=================================================
-ynh_script_progression --message="Starting a systemd service..." --weight=1
+ynh_script_progression "Starting $app's systemd service..."
 
-ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"
+ynh_systemctl --service=$app --action="start"
 
 #=================================================
 # END OF SCRIPT
 #=================================================
 
-ynh_script_progression --message="Upgrade of $app completed" --last
+ynh_script_progression "Upgrade of $app completed"