diff --git a/index.html b/index.html
index cf240f3..ea7a265 100644
--- a/index.html
+++ b/index.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
     <head>
         <script src="wfa.js" type="module"></script>
         <script type="module">
@@ -23,9 +23,9 @@
         </script>
     </head>
     <body>
-        <label>A: </label><input id="a">
-        <label>B: </label><input id="b">
-        <button id="submit">Submit</button>
+        <label>A: </label><input type="text" id="a">
+        <label>B: </label><input type="text" id="b">
+        <button id="submit" type="button">Submit</button>
         <p><span>Result: </span><span id="result"></span></p>
     </body>
 </html>
\ No newline at end of file
