diff --git a/app/class/Controllerhome.php b/app/class/Controllerhome.php
index be4a371..0875d07 100644
--- a/app/class/Controllerhome.php
+++ b/app/class/Controllerhome.php
@@ -98,7 +98,9 @@ public function desktop()
             $vars['hiddencolumncount'] = count(User::HOME_COLUMNS) - count($this->user->columns());
 
             if ($display === 'graph') {
-                $graph = new Graph($_GET);
+                $graph = $this->servicesession->getgraph();
+                $graph->hydrate($_GET);
+                $this->servicesession->setgraph($graph);
                 $datas = $this->modelhome->cytodata($pagelistopt, $graph);
                 $vars['json'] = json_encode($datas);
                 $vars['graph'] = $graph;
diff --git a/app/class/Servicesession.php b/app/class/Servicesession.php
index 2b3414d..68a3bcb 100644
--- a/app/class/Servicesession.php
+++ b/app/class/Servicesession.php
@@ -55,6 +55,17 @@ public function getworkspace(): Workspace
         return new Workspace($datas);
     }
 
+    public function setgraph(Graph $graph): void
+    {
+        $_SESSION['graph'] = $graph->dry();
+    }
+
+    public function getgraph(): Graph
+    {
+        $datas = $_SESSION['graph'] ?? [];
+        return new Graph($datas);
+    }
+
     /**
      * Empty current user session
      */