diff --git a/README.md b/README.md
index 77243b9..bd744b0 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # JupyterLab for YunoHost
 
 [![Integration level](https://dash.yunohost.org/integration/jupyterlab.svg)](https://dash.yunohost.org/appci/app/jupyterlab) ![](https://ci-apps.yunohost.org/ci/badges/jupyterlab.status.svg) ![](https://ci-apps.yunohost.org/ci/badges/jupyterlab.maintain.svg)  
-[![Install JupyterLab with YunoHost](https://install-app.yunohost.org/install-with-yunohost.png)](https://install-app.yunohost.org/?app=jupyterlab)
+[![Install JupyterLab with YunoHost](https://install-app.yunohost.org/install-with-yunohost.svg)](https://install-app.yunohost.org/?app=jupyterlab)
 
 *[Lire ce readme en français.](./README_fr.md)*
 
@@ -11,7 +11,7 @@ If you don't have YunoHost, please see [here](https://yunohost.org/#/install) to
 ## Overview
 JupyterLab is the next-generation user interface for Project Jupyter offering all the familiar building blocks of the classic Jupyter Notebook (notebook, terminal, text editor, file browser, rich outputs, etc.) in a flexible and powerful user interface. JupyterLab will eventually replace the classic Jupyter Notebook.
 
-**Shipped version:** 2.2.8
+**Shipped version:** 3.0.1
 
 ## Screenshots
 
@@ -51,8 +51,7 @@ How to configure this app: by an admin panel, a plain file with SSH.
 
 ---
 
-Developers info
-----------------
+## Developers info
 
 Please do your pull request to the [testing branch](https://github.com/YunoHost-Apps/jupyterlab_ynh/tree/testing).
 
diff --git a/README_fr.md b/README_fr.md
index d9c6a7e..6ab974c 100644
--- a/README_fr.md
+++ b/README_fr.md
@@ -1,7 +1,7 @@
 # JupyterLab pour YunoHost
 
 [![Integration level](https://dash.yunohost.org/integration/jupyterlab.svg)](https://dash.yunohost.org/appci/app/jupyterlab) ![](https://ci-apps.yunohost.org/ci/badges/jupyterlab.status.svg) ![](https://ci-apps.yunohost.org/ci/badges/jupyterlab.maintain.svg)  
-[![Installer JupyterLab avec YunoHost](https://install-app.yunohost.org/install-with-yunohost.png)](https://install-app.yunohost.org/?app=jupyterlab)
+[![Installer JupyterLab avec YunoHost](https://install-app.yunohost.org/install-with-yunohost.svg)](https://install-app.yunohost.org/?app=jupyterlab)
 
 *[Read this readme in english.](./README.md)* 
 
@@ -11,7 +11,7 @@ Si vous n’avez pas YunoHost, regardez [ici](https://yunohost.org/#/install) po
 ## Vue d’ensemble
 JupyterLab est une interface utilisateur de nouvelle génération pour le projet Jupyter offrant tous les modules de Jupyter Notebook (interpréteur Python, terminal, éditeur de texte, navigateur de fichiers, etc.) dans une interface utilisateur flexible et puissante. JupyterLab remplacera à terme Jupyter Notebook.
 
-**Version incluse :** 2.2.8
+**Version incluse :** 3.0.1
 
 ## Captures d’écran
 
@@ -51,8 +51,7 @@ Comment configurer cette application : via le panneau d'administration, un fichi
 
 ---
 
-Informations pour les développeurs
-----------------
+## Informations pour les développeurs
 
 Merci de faire vos pull request sur la [branche testing](https://github.com/YunoHost-Apps/jupyterlab_ynh/tree/testing).
 
diff --git a/check_process b/check_process
index 4ecf7c0..8cba3e2 100644
--- a/check_process
+++ b/check_process
@@ -16,8 +16,6 @@
 		multi_instance=1
 		port_already_use=1
 		change_url=1
-;;; Levels
-	Level 5=auto
 ;;; Options
 Email=
 Notification=none
diff --git a/manifest.json b/manifest.json
index 6521eaf..13a3041 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Code console environment for running Python code interactively.",
         "fr": "Console de code pour exécuter du code Python de manière interactive."
     },
-    "version": "2.2.8~ynh1",
+    "version": "3.0.1~ynh1",
     "url": "https://jupyterlab.readthedocs.io/en/stable/",
     "license": "BSD-3-Clause",
     "maintainer": {
@@ -14,7 +14,7 @@
         "email": "pierre@kayou.io"
     },
     "requirements": {
-        "yunohost": ">= 3.5"
+        "yunohost": ">= 3.8.1"
     },
     "multi_instance": true,
     "services": [
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 45279be..62d9ee4 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -7,9 +7,9 @@
 # dependencies used by the app
 pkg_dependencies="python3-dev python3-pip libffi-dev libzmq3-dev"
 
-nodejs_version="12"
+nodejs_version="14"
 
-jupyterlab_version="2.2.8"
+jupyterlab_version="3.0.1"
 
 #=================================================
 # PERSONAL HELPERS
diff --git a/scripts/install b/scripts/install
index a0b30fe..eef71e1 100644
--- a/scripts/install
+++ b/scripts/install
@@ -109,6 +109,14 @@ ynh_script_progression --message="Configuring nginx web server..." --weight=1
 # Create a dedicated nginx config
 ynh_add_nginx_config
 
+#=================================================
+# CREATE DEDICATED USER
+#=================================================
+ynh_script_progression --message="Configuring system user..." --weight=1
+
+# Create a system user
+ynh_system_user_create --username=$app
+
 #=================================================
 # SPECIFIC SETUP
 #=================================================
@@ -165,7 +173,7 @@ chown -R $admin: $final_path/.venv/
 # ADVERTISE SERVICE IN ADMIN PANEL
 #=================================================
 
-yunohost service add $app --description "$app daemon" --log_type "systemd" --log "$app"
+yunohost service add $app --description="$app daemon" --log="$app"
 
 #=================================================
 # START SYSTEMD SERVICE
diff --git a/scripts/remove b/scripts/remove
index 9da7481..d7bf337 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -91,6 +91,14 @@ then
 	ynh_exec_warn_less yunohost firewall disallow TCP $port_http_proxy
 fi
 
+#=================================================
+# REMOVE DEDICATED USER
+#=================================================
+ynh_script_progression --message="Removing the dedicated system user..." --weight=1
+
+# Delete a system user
+ynh_system_user_delete --username=$app
+
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index 38823a0..4e2faa1 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -23,7 +23,7 @@ ynh_abort_if_errors
 #=================================================
 # LOAD SETTINGS
 #=================================================
-ynh_script_progression --message="Loading settings..."
+ynh_script_progression --message="Loading settings..." --weight=1
 
 app=$YNH_APP_INSTANCE_NAME
 
@@ -35,7 +35,7 @@ final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 #=================================================
 # CHECK IF THE APP CAN BE RESTORED
 #=================================================
-ynh_script_progression --message="Validating restoration parameters..."
+ynh_script_progression --message="Validating restoration parameters..." --weight=1
 
 ynh_webpath_available --domain=$domain --path_url=$path_url \
 	|| ynh_die --message="Path not available: ${domain}${path_url}"
@@ -53,10 +53,18 @@ ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 #=================================================
 # RESTORE THE APP MAIN DIR
 #=================================================
-ynh_script_progression --message="Restoring the app main directory..."
+ynh_script_progression --message="Restoring the app main directory..." --weight=5
 
 ynh_restore_file --origin_path="$final_path"
 
+#=================================================
+# RECREATE THE DEDICATED USER
+#=================================================
+ynh_script_progression --message="Recreating the dedicated system user..." --weight=1
+
+# Create the dedicated user (if not existing)
+ynh_system_user_create --username=$app
+
 #=================================================
 # RESTORE USER RIGHTS
 #=================================================
@@ -84,21 +92,21 @@ npm install -g configurable-http-proxy
 #=================================================
 # RESTORE SYSTEMD
 #=================================================
-ynh_script_progression --message="Restoring the systemd configuration..."
+ynh_script_progression --message="Restoring the systemd configuration..." --weight=2
 
 ynh_restore_file --origin_path="/etc/systemd/system/$app.service"
-systemctl enable $app.service
+systemctl enable $app.service --quiet
 
 #=================================================
 # ADVERTISE SERVICE IN ADMIN PANEL
 #=================================================
 
-yunohost service add $app --description "$app daemon" --log_type "systemd" --log "$app"
+yunohost service add $app --description="$app daemon" --log="$app"
 
 #=================================================
 # START SYSTEMD SERVICE
 #=================================================
-ynh_script_progression --message="Starting a systemd service..."
+ynh_script_progression --message="Starting a systemd service..." --weight=5
 
 ynh_systemd_action --service_name=$app --action="start" --line_match="JupyterHub is now running at" --log_path="systemd"
 
@@ -107,7 +115,7 @@ ynh_systemd_action --service_name=$app --action="start" --line_match="JupyterHub
 #=================================================
 # RELOAD NGINX
 #=================================================
-ynh_script_progression --message="Reloading nginx web server..."
+ynh_script_progression --message="Reloading nginx web server..." --weight=1
 
 ynh_systemd_action --service_name=nginx --action=reload
 
diff --git a/scripts/upgrade b/scripts/upgrade
index 3d92a49..3208bff 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -76,18 +76,26 @@ ynh_abort_if_errors
 #=================================================
 # STOP SYSTEMD SERVICE
 #=================================================
-ynh_script_progression --message="Stopping a systemd service..."
+ynh_script_progression --message="Stopping a systemd service..." --weight=2
 
 ynh_systemd_action --service_name=$app --action="stop"
 
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
-ynh_script_progression --message="Upgrading nginx web server configuration..."
+ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=1
 
 # Create a dedicated nginx config
 ynh_add_nginx_config
 
+#=================================================
+# CREATE DEDICATED USER
+#=================================================
+ynh_script_progression --message="Making sure dedicated system user exists..." --weight=1
+
+# Create a dedicated user (if not existing)
+ynh_system_user_create --username=$app
+
 #=================================================
 # UPGRADE DEPENDENCIES
 #=================================================
@@ -171,6 +179,12 @@ ynh_add_systemd_config
 chown -R root: $final_path/
 chown -R $admin: $final_path/.venv/
 
+#=================================================
+# ADVERTISE SERVICE IN ADMIN PANEL
+#=================================================
+
+yunohost service add $app --description="$app daemon" --log="$app"
+
 #=================================================
 # SETUP SSOWAT
 #=================================================