diff --git a/scripts/change_url b/scripts/change_url
index c6b3bcb..9f0cb6d 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -82,7 +82,7 @@ fi
 #=================================================
 # 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/install b/scripts/install
index 07dac7c..c2fd5c1 100644
--- a/scripts/install
+++ b/scripts/install
@@ -45,6 +45,14 @@ ynh_script_progression --message="Storing installation settings..." --weight=2
 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
 #=================================================
@@ -86,14 +94,14 @@ ynh_replace_string --match_string="are currently uploaded to imgur.*re working o
 #=================================================
 
 # Set permissions to app files
-chown -R root:www-data "$final_path"
+chown -R $app:www-data "$final_path"
 chmod -R 640 "$final_path"
 find "$final_path" -type d -print0 | xargs -0 chmod 750
 
 #=================================================
 # SETUP SSOWAT
 #=================================================
-ynh_script_progression --message="Configuring permissions..."
+ynh_script_progression --message="Configuring permissions..." --weight=1
 
 # Make app public if necessary
 if [ $is_public -eq 1 ]
@@ -104,7 +112,7 @@ fi
 #=================================================
 # 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/remove b/scripts/remove
index af1284c..12d0321 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -37,6 +37,14 @@ ynh_script_progression --message="Removing NGINX web server configuration..."
 # Remove the dedicated NGINX config
 ynh_remove_nginx_config
 
+#=================================================
+# 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 ac9fe5c..9865364 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -44,6 +44,14 @@ ynh_script_progression --message="Restoring the NGINX web server 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..." --weight=1
+
+# Create the dedicated user (if not existing)
+ynh_system_user_create --username=$app --home_dir="$final_path"
+
 #=================================================
 # RESTORE THE APP MAIN DIR
 #=================================================
@@ -56,7 +64,7 @@ ynh_restore_file --origin_path="$final_path"
 #=================================================
 
 # Restore permissions on app files
-chown -R root:www-data "$final_path"
+chown -R $app:www-data "$final_path"
 chmod -R 640 "$final_path"
 find "$final_path" -type d -print0 | xargs -0 chmod 750
 
diff --git a/scripts/upgrade b/scripts/upgrade
index 5425a65..2710124 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -58,6 +58,14 @@ if ynh_legacy_permissions_exists; then
     ynh_app_setting_delete --app=$app --key=is_public
 fi
 
+#=================================================
+# 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=$app --home_dir="$final_path"
+
 #=================================================
 # STANDARD UPGRADE STEPS
 #=================================================
@@ -106,7 +114,7 @@ fi
 #=================================================
 
 # Set permissions on app files
-chown -R root:www-data "$final_path"
+chown -R $app:www-data "$final_path"
 chmod -R 640 "$final_path"
 find "$final_path" -type d -print0 | xargs -0 chmod 750