diff --git a/check_process b/check_process
index 77d3074..eb1df2b 100644
--- a/check_process
+++ b/check_process
@@ -1,13 +1,8 @@
-# See here for more information
-# https://github.com/YunoHost/package_check#syntax-check_process-file
-
-# Move this file from check_process.default to check_process when you have filled it.
-
 ;; Test complet
 	; Manifest
-		domain="domain.tld"	(DOMAIN)
-		path="/path"	(PATH)
-		is_public=1	(PUBLIC|public=1|private=0)
+		domain="domain.tld"
+		path="/path"
+		is_public=1
 	; Checks
 		pkg_linter=1
 		setup_sub_dir=1
@@ -18,7 +13,6 @@
 		upgrade=1
 		backup_restore=1
 		multi_instance=1
-		port_already_use=0
 		change_url=1
 ;;; Options
 Email=
diff --git a/manifest.json b/manifest.json
index fe8459f..ee0c409 100644
--- a/manifest.json
+++ b/manifest.json
@@ -3,8 +3,8 @@
     "id": "anarchism",
     "packaging_format": 1,
     "description": {
-        "en": "An exhaustive exploration of Anarchist theory and practice.",
-        "fr": "Exploration exhaustive de la théorie et de la pratique anarchiste."
+        "en": "Exhaustive exploration of Anarchist theory and practice",
+        "fr": "Exploration exhaustive de la théorie et de la pratique anarchiste"
     },
     "version": "15.3-3~ynh1",
     "url": "https://salsa.debian.org/debian/anarchism/",
diff --git a/scripts/install b/scripts/install
index 7c8aa2e..5510e3d 100755
--- a/scripts/install
+++ b/scripts/install
@@ -49,6 +49,14 @@ ynh_script_progression --message="Storing installation settings..." --weight=1
 ynh_app_setting_set --app=$app --key=domain --value=$domain
 ynh_app_setting_set --app=$app --key=path --value=$path_url
 
+#=================================================
+# 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"
+
 #=================================================
 # STANDARD MODIFICATIONS
 #=================================================
@@ -60,6 +68,10 @@ ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 # Download, check integrity, uncompress and patch the source from app.src
 ynh_setup_source --dest_dir="$final_path"
 
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:www-data "$final_path"
+
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
@@ -68,15 +80,6 @@ ynh_script_progression --message="Configuring NGINX web server..." --weight=1
 # Create a dedicated nginx config
 ynh_add_nginx_config
 
-#=================================================
-# GENERIC FINALIZATION
-#=================================================
-# SECURE FILES AND DIRECTORIES
-#=================================================
-
-# Set permissions to app files
-chown -R root: $final_path
-
 #=================================================
 # SETUP SSOWAT
 #=================================================
diff --git a/scripts/remove b/scripts/remove
index 1b2d038..2d3c5ff 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -29,6 +29,16 @@ ynh_script_progression --message="Removing app main directory..." --weight=1
 # Remove the app directory securely
 ynh_secure_remove --file="$final_path"
 
+#=================================================
+# GENERIC FINALIZATION
+#=================================================
+# REMOVE DEDICATED USER
+#=================================================
+ynh_script_progression --message="Removing the dedicated system user..." --weight=1
+
+# Delete a system user
+ynh_system_user_delete --username=$app
+
 #=================================================
 # REMOVE NGINX CONFIGURATION
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index 3b97dd4..ecaa0bf 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -36,8 +36,6 @@ final_path=$(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 "
 
@@ -46,9 +44,18 @@ test ! -d $final_path \
 #=================================================
 # RESTORE THE NGINX CONFIGURATION
 #=================================================
+ynh_script_progression --message="Restoring the NGINX configuration..." --weight=1
 
 ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 
+#=================================================
+# 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=$app --home_dir="$final_path"
+
 #=================================================
 # RESTORE THE APP MAIN DIR
 #=================================================
@@ -56,12 +63,9 @@ ynh_script_progression --message="Restoring the app main directory..." --weight=
 
 ynh_restore_file --origin_path="$final_path"
 
-#=================================================
-# RESTORE USER RIGHTS
-#=================================================
-
-# Restore permissions on app files
-chown -R root: $final_path
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:www-data "$final_path"
 
 #=================================================
 # GENERIC FINALIZATION
diff --git a/scripts/upgrade b/scripts/upgrade
index 4dcf663..aea78fa 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -26,6 +26,20 @@ final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 
 upgrade_type=$(ynh_check_app_version_changed)
 
+#=================================================
+# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
+#=================================================
+ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=3
+
+# Backup the current version of the app
+ynh_backup_before_upgrade
+ynh_clean_setup () {
+	# restore it if the upgrade fails
+	ynh_restore_upgradebackup
+}
+# Exit if an error occurs during the execution of the script
+ynh_abort_if_errors
+
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================
@@ -52,18 +66,12 @@ if ynh_legacy_permissions_exists; then
 fi
 
 #=================================================
-# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
+# CREATE DEDICATED USER
 #=================================================
-ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=3
+ynh_script_progression --message="Making sure dedicated system user exists..." --weight=1
 
-# Backup the current version of the app
-ynh_backup_before_upgrade
-ynh_clean_setup () {
-	# restore it if the upgrade fails
-	ynh_restore_upgradebackup
-}
-# Exit if an error occurs during the execution of the script
-ynh_abort_if_errors
+# Create a dedicated user (if not existing)
+ynh_system_user_create --username=$app --home_dir="$final_path"
 
 #=================================================
 # STANDARD UPGRADE STEPS
@@ -79,6 +87,10 @@ then
 	ynh_setup_source --dest_dir="$final_path"
 fi
 
+chmod 750 "$final_path"
+chmod -R o-rwx "$final_path"
+chown -R $app:www-data "$final_path"
+
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
@@ -87,15 +99,6 @@ ynh_script_progression --message="Upgrading NGINX web server configuration..." -
 # Create a dedicated nginx config
 ynh_add_nginx_config
 
-#=================================================
-# GENERIC FINALIZATION
-#=================================================
-# SECURE FILES AND DIRECTORIES
-#=================================================
-
-# Set permissions on app files
-chown -R root: $final_path
-
 #=================================================
 # RELOAD NGINX
 #=================================================