diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9009e8d3..6d0e2052 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [UNRELEASED]
+
 ## [1.10.0] - 2026-06-10
 
 ### Fixed
diff --git a/inc/graph.class.php b/inc/graph.class.php
index 43b269ad..528f3d6f 100644
--- a/inc/graph.class.php
+++ b/inc/graph.class.php
@@ -125,7 +125,7 @@ public function initGraph($options)
      * @param $show_label : behavior of the graph labels,
      *                      values : 'hover', 'never', 'always' (optionnal)
      * @param $export : keep only svg to export (optionnal)
-     * @return void|bool
+     * @return void|string|bool
      */
     public function showHbar($params, $dashboard = false, $width = false)
     {
@@ -334,7 +334,7 @@ public function showHbar($params, $dashboard = false, $width = false)
      * @param $show_label : behavior of the graph labels,
      *                      values : 'hover', 'never', 'always' (optionnal)
      * @param $export : keep only svg to export (optionnal)
-     * @return void|bool
+     * @return void|string|bool
      */
     public function showPie($params, $dashboard = false, $width = false)
     {