diff --git a/src/js/pannellum.js b/src/js/pannellum.js
index f3ba9d6..5ae57dc 100644
--- a/src/js/pannellum.js
+++ b/src/js/pannellum.js
@@ -160,7 +160,7 @@ uiContainer.appendChild(dragFix);
 // Display about information on right click
 var aboutMsg = document.createElement('span');
 aboutMsg.className = 'pnlm-about-msg';
-aboutMsg.innerHTML = '<a href="https://pannellum.org/" target="_blank">Pannellum</a>';
+aboutMsg.innerHTML = '<a href="https://pannellum.org/" target="_blank" rel="noopener noreferrer nofollow">Pannellum</a>';
 uiContainer.appendChild(aboutMsg);
 dragFix.addEventListener('contextmenu', aboutMessage);