diff --git a/htdocs/core/lib/website2.lib.php b/htdocs/core/lib/website2.lib.php
index e66ef50b161..a44db7c9201 100644
--- a/htdocs/core/lib/website2.lib.php
+++ b/htdocs/core/lib/website2.lib.php
@@ -250,7 +250,7 @@ function dolSavePageContent($filetpl, Website $object, WebsitePage $objectpage,
 	// Add js
 	$tplcontent .= '<link rel="stylesheet" href="/styles.css.php?website=<?php echo $websitekey; ?>" type="text/css" />'."\n";
 	$tplcontent .= '<!-- Include link to JS file -->'."\n";
-	$tplcontent .= '<script src="/javascript.js.php"></script>'."\n";
+	$tplcontent .= '<script async src="/javascript.js.php"></script>'."\n";
 	// Add headers
 	$tplcontent .= '<!-- Include HTML header from common file -->'."\n";
 	$tplcontent .= '<?php if (file_exists(DOL_DATA_ROOT."/website/".$websitekey."/htmlheader.html")) include DOL_DATA_ROOT."/website/".$websitekey."/htmlheader.html"; ?>'."\n";