diff --git a/static/index.html b/static/index.html
index b25c065..28fb258 100644
--- a/static/index.html
+++ b/static/index.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html>
+<html lang="en">
 <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
