diff --git a/scripts/install b/scripts/install
index 6e22846..93096ee 100644
--- a/scripts/install
+++ b/scripts/install
@@ -49,6 +49,14 @@ ynh_app_setting_set --app=$app --key=domain --value=$domain
 ynh_app_setting_set --app=$app --key=path --value=$path_url
 ynh_app_setting_set --app=$app --key=is_public --value=$is_public
 
+#=================================================
+# CREATE DEDICATED USER
+#=================================================
+ynh_script_progression --message="Configuring system user..."
+
+# Create a system user
+ynh_system_user_create --username=$app --home_dir="$final_path"
+
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
@@ -58,6 +66,10 @@ 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
 #=================================================
@@ -71,16 +83,6 @@ then
   ynh_replace_string "^#sub_path_only" "" "/etc/nginx/conf.d/$domain.d/$app.conf"
 fi
 
-#=================================================
-# GENERIC FINALIZATION
-#=================================================
-# SECURE FILES AND DIRECTORIES
-#=================================================
-ynh_script_progression --message="Securing files and directories..."
-
-# Set permissions to app files
-chown -R www-data: $final_path
-
 #=================================================
 # SETUP SSOWAT
 #=================================================
diff --git a/scripts/remove b/scripts/remove
index 6e5d453..e009d4b 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -36,6 +36,16 @@ ynh_script_progression --message="Removing NGINX web server configuration..."
 # Remove the dedicated NGINX config
 ynh_remove_nginx_config
 
+#=================================================
+# GENERIC FINALIZATION
+#=================================================
+# REMOVE DEDICATED USER
+#=================================================
+ynh_script_progression --message="Removing the dedicated system user..."
+
+# Delete a system user
+ynh_system_user_delete --username=$app
+
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/restore b/scripts/restore
index d33c548..2df94e3 100755
--- a/scripts/restore
+++ b/scripts/restore
@@ -48,6 +48,14 @@ ynh_script_progression --message="Restoring the NGINX configuration..."
 
 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..."
+
+# Create the dedicated user (if not existing)
+ynh_system_user_create --username=$app --home_dir="$final_path"
+
 #=================================================
 # RESTORE THE APP MAIN DIR
 #=================================================
@@ -55,13 +63,9 @@ ynh_script_progression --message="Restoring the app main directory..."
 
 ynh_restore_file --origin_path="$final_path"
 
-#=================================================
-# RESTORE USER RIGHTS
-#=================================================
-ynh_script_progression --message="Restoring user rights..."
-
-# Restore permissions on app files
-chown -R www-data: $final_path
+chmod 750 "$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 e675586..1079291 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -61,6 +61,14 @@ ynh_clean_setup () {
 # Exit if an error occurs during the execution of the script
 ynh_abort_if_errors
 
+#=================================================
+# CREATE DEDICATED USER
+#=================================================
+ynh_script_progression --message="Making sure dedicated system user exists..."
+
+# Create a dedicated user (if not existing)
+ynh_system_user_create --username=$app --home_dir="$final_path"
+
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
@@ -73,6 +81,10 @@ 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
 #=================================================