diff --git a/projects/thunderbird.html b/projects/thunderbird.html
index 0f7edfa..648e474 100644
--- a/projects/thunderbird.html
+++ b/projects/thunderbird.html
@@ -42,6 +42,7 @@ title: Thunderbird
          <hr>
          <a class="button boxed identihub" href="https://demo.identihub.co/project/thunderbird" target="_blank"><img src="../images/projects/identihub.svg" > Identihub</a><br />
         <a class="button boxed thunderbird" href="https://thunderbird.net" target="_blank"><i class="fas fa-globe"></i> Website</a>
+        <a class="button boxed thunderbird" href="https://thunderbird.net" target="_blank"><i class="fas fa-globe"></i> Usability Research</a>
       </div>
     </div>
   </div>