diff --git a/site/templates/index.j2 b/site/templates/index.j2
index 1dab2f7..f979c53 100644
--- a/site/templates/index.j2
+++ b/site/templates/index.j2
@@ -114,4 +114,15 @@
                 <img src="/static/{{ image }}" alt="{{ image }}" width="88" height="31">
             </a>
         {% endfor %}
+    </p>
+    <h2>
+        credits
+    </h2>
+    <p>
+        <ul>
+            <li>
+                <a href="https://www.vantajs.com/">Vanta.js</a> - background effect
+            </li>
+        </ul>
+    </p>
 </body>