diff --git a/static/index.html b/static/index.html
index 16acacc5..bf0f00cf 100644
--- a/static/index.html
+++ b/static/index.html
@@ -1,4 +1,3 @@
-
 <!-- TODO: NOTICE: -->
 <!-- TODO: This is a simple wasm demo of the compiler. -->
 <!-- TODO: The 'real' version should be in github.com/mangolang/website. -->
@@ -37,11 +36,16 @@
 	<section id="content">
 		<h1>Mango (wasm)</h1>
 		<div id="editor">// Type your Mango code here!
-
-</div>
-		<button id="compile_wat" onclick="alert('Not ready yet, please wait or check console');" title="Compile the code to the ascii text representation of WebAssembly">Compile to wat</button>
-		<button onclick="alert('Not implemented');" title="Compile the code to binary, executable WebAssembly">Compile to wasm</button>
-		<button onclick="alert('Not implemented');" title="Compile the code to binary WebAssembly and run it, showing only the output">Compile and run</button>
+		
+		</div>
+		<button id="compile_wat" onclick="alert('Not ready yet, please wait or check console');"
+		        title="Compile the code to the ascii text representation of WebAssembly">Compile to wat
+		</button>
+		<button onclick="alert('Not implemented');" title="Compile the code to binary, executable WebAssembly">Compile to wasm
+		</button>
+		<button onclick="alert('Not implemented');"
+		        title="Compile the code to binary WebAssembly and run it, showing only the output">Compile and run
+		</button>
 		<div id="output"></div>
 	</section>
 </main>
@@ -60,36 +64,37 @@ <h1>Mango (wasm)</h1>
 </script>
 
 <!--Wasm Mango compiler-->
-<script src="mango.js" type="module"></script>
+<script src="./mango.js" type="module"></script>
 <script type="module">
-    /**
-     * Show a string in the output area, replacing any previous results.
-     */
-	function show_output(txt) {
-		let output = document.getElementById("output");
-		output.innerHTML = "";
-		let pre = document.createElement("pre");
-		pre.innerHTML = txt;
-		output.appendChild(pre);
-	}
-	
-	/**
-	 * Load the Mango compiler wasm code.
-	 */
-    window.wasm_bindgen("./mango_bg.wasm").then(() => {
+    (async function () {
+        /**
+         * Show a string in the output area, replacing any previous results.
+         */
+        function show_output(txt) {
+            let output = document.getElementById("output");
+            output.innerHTML = "";
+            let pre = document.createElement("pre");
+            pre.innerHTML = txt;
+            output.appendChild(pre);
+        }
+
+        /**
+         * Load the Mango compiler wasm code (async).
+         */
+        let _ = await window.wasm_bindgen("./mango_bg.wasm");
         let mango = window.wasm_bindgen;
 
         /**
          * Bind the "compile to wat" button.
          */
-        document.getElementById("compile_wat").onclick = function(event) {
+        document.getElementById("compile_wat").onclick = function (event) {
             let mangocode = window.editor.getValue();
             console.log("Compiling Mango:\n", mangocode);
-	        let watcode = mango.compile_string_to_wat(mangocode);
-	        console.log("Resulting WebAssembly text:\n", watcode);
-	        show_output(watcode);
+            let watcode = mango.compile_string_to_wat(mangocode);
+            console.log("Resulting WebAssembly text:\n", watcode);
+            show_output(watcode);
         };
-    });
+    })();
 </script>
 </body>
 </html>