diff --git a/lib/zin/wg/gantt/js/v1.js b/lib/zin/wg/gantt/js/v1.js
index 6315ced152..d3b361dc97 100644
--- a/lib/zin/wg/gantt/js/v1.js
+++ b/lib/zin/wg/gantt/js/v1.js
@@ -113,7 +113,7 @@ function drawGanttToCanvas(exportType, successCallback, errorCallback)
         {
             if(progressTimer) clearInterval(progressTimer);
             updateProgress(0.7);
-            html2canvas($ganttContainer[0], {logging: false}).then(function(canvas)
+            html2canvas($ganttContainer[0], {logging: false, scale: 1}).then(function(canvas)
             {
                 let isExportPDF = exportType === 'pdf';
                 updateProgress(isExportPDF ? 0.8 : 0.9);
@@ -249,3 +249,19 @@ function zoomTasks(value)
     gantt.render();
     $('.gantt_grid_head_cell .sort').addClass(value);
 }
+
+/**
+ * Update criticalPath
+ *
+ * @access public
+ * @return void
+ */
+function updateCriticalPath()
+{
+    let showCriticalPath = !gantt.config.highlight_critical_path;
+
+    $('#criticalPath').html(showCriticalPath ? ganttLang.hideCriticalPath : ganttLang.showCriticalP);
+    gantt.config.highlight_critical_path = showCriticalPath;
+
+    gantt.render();
+}