diff --git a/_includes/header.html b/_includes/header.html
index fee23e0f77..6c2d0ee73c 100644
--- a/_includes/header.html
+++ b/_includes/header.html
@@ -16,6 +16,7 @@
           {% endif %}
         {% endfor %}
         <a class="page-link" href="https://domokit.github.io/docs/sky/">API</a>
+        <a class="page-link" href="https://github.com/domokit/sky_engine/">Source</a>
       </div>
     </nav>
   </div>