diff --git a/pages/ajax.render.php b/pages/ajax.render.php
index 31634da52f..8721539ffe 100644
--- a/pages/ajax.render.php
+++ b/pages/ajax.render.php
@@ -41,6 +41,7 @@ try
 	
 	$oPage = new ajax_page("");
 	$oPage->no_cache();
+
 	
 	$operation = utils::ReadParam('operation', '');
 	$sFilter = stripslashes(utils::ReadParam('filter', '', false, 'raw_data'));
@@ -449,6 +450,12 @@ try
 		break;
 		
 		case 'open_flash_chart':
+		// Workaround for IE8 + IIS + HTTPS
+		// See TRAC #363, fix described here: http://forums.codecharge.com/posts.php?post_id=97771
+		$oPage->add_header("Expires: Fri, 17 Jul 1970 05:00:00 GMT");
+		$oPage->add_header("Cache-Control: cache, must-revalidate");
+		$oPage->add_header("Pragma: public");
+
 		$oPage->SetContentType('application/json');
 		$aParams = utils::ReadParam('params', array());
 		if ($sFilter != '')