diff --git a/index.html b/index.html
index cf1a2aa..9392b71 100644
--- a/index.html
+++ b/index.html
@@ -9,5 +9,16 @@
 </head>
 <body>
     <div id="app"></div>
+    <svg width="0" height="0" xmlns="http://www.w3.org/2000/svg">
+        <filter id="green">
+          <feColorMatrix
+            type="matrix"
+            values="0.0 0.0 0.0 0.0 0
+                    0.0 1.0 0.0 0.0 0
+                    0.0 0.0 0.5 0.0 0
+                    0.0 0.0 0.0 1.0 0"
+          />
+          </filter>
+      </svg>
     <script src="dist/preact.bundle.js"></script>
 </body>
