diff --git a/packages/@vue/cli-service/generator/template/public/index.html b/packages/@vue/cli-service/generator/template/public/index.html
index 3d4e96efc2..2a4672c1f7 100644
--- a/packages/@vue/cli-service/generator/template/public/index.html
+++ b/packages/@vue/cli-service/generator/template/public/index.html
@@ -1,5 +1,5 @@
 <!DOCTYPE html>
-<html lang="en">
+<html lang="">
   <head>
     <meta charset="utf-8">
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
