diff --git a/docs/index.html b/docs/index.html
index edf5bd6..56cc017 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -1,3 +1,5 @@
+<!DOCTYPE html>
+
 <!--
   Based on:
   - https://github.com/tree-sitter/tree-sitter/blob/335190c/cli/src/web_ui.html
@@ -9,6 +11,7 @@
   - https://github.com/tree-sitter/tree-sitter.github.io/blob/7371e63/tree-sitter.wasm
   - Or download those files from https://github.com/tree-sitter/tree-sitter/releases/
 -->
+<html>
 
 <head>
   <meta charset="utf-8">
@@ -205,5 +208,8 @@
       text-decoration: underline red dashed;
       -webkit-text-decoration: underline red dashed;
     }
+
   </style>
 </body>
+
+</html>
