diff --git a/manifest.json b/manifest.json
index 98dd2df..e3d5995 100644
--- a/manifest.json
+++ b/manifest.json
@@ -14,7 +14,7 @@
         "email": "pierre@kayou.io"
     },
     "requirements": {
-        "yunohost": ">= 4.1.7"
+        "yunohost": ">= 4.3.0"
     },
     "multi_instance": true,
     "services": [
@@ -24,8 +24,7 @@
         "install": [
             {
                 "name": "domain",
-                "type": "domain",
-                "example": "example.com"
+                "type": "domain"
             },
             {
                 "name": "path",
@@ -35,8 +34,7 @@
             },
             {
                 "name": "admin",
-                "type": "user",
-                "example": "johndoe"
+                "type": "user"
             },
             {
                 "name": "is_public",
diff --git a/scripts/_common.sh b/scripts/_common.sh
index 95bd0cc..b71b167 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -9,7 +9,7 @@ pkg_dependencies="python3-dev python3-pip libffi-dev libzmq3-dev"
 
 nodejs_version="15"
 
-jupyterlab_version="3.1.11"
+jupyterlab_version="3.2.4"
 
 #=================================================
 # PERSONAL HELPERS
diff --git a/scripts/install b/scripts/install
index 290fff2..e36e1bb 100644
--- a/scripts/install
+++ b/scripts/install
@@ -81,6 +81,14 @@ python3 -m pip install pipenv
 
 npm install -g configurable-http-proxy
 
+#=================================================
+# CREATE DEDICATED USER
+#=================================================
+ynh_script_progression --message="Configuring system user..." --weight=1
+
+# Create a system user
+ynh_system_user_create --username=$app --home_dir="$final_path"
+
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
@@ -104,14 +112,6 @@ 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=$app
-
 #=================================================
 # SPECIFIC SETUP
 #=================================================
@@ -143,8 +143,12 @@ ynh_add_config --template="../conf/jupyter_notebook_config.py" --destination="$f
 #=================================================
 
 # Set permissions to app files
-chown -R root: $final_path/
-chown -R $admin: $final_path/.venv/
+#chown -R root: $final_path/
+#chown -R $admin: $final_path/.venv/
+
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:www-data "$final_path"
 
 #=================================================
 # ADVERTISE SERVICE IN ADMIN PANEL
diff --git a/scripts/restore b/scripts/restore
index 5dc2da6..719b8cd 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -37,10 +37,7 @@ final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 #=================================================
 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}"
-test ! -d $final_path \
-	|| ynh_die --message="There is already a directory: $final_path "
+test ! -d $final_path || ynh_die --message="There is already a directory: $final_path "
 
 #=================================================
 # STANDARD RESTORATION STEPS