diff --git a/packages/graphql-playground-html/minimal.html b/packages/graphql-playground-html/minimal.html
index 1420a5564..7b0e02a83 100644
--- a/packages/graphql-playground-html/minimal.html
+++ b/packages/graphql-playground-html/minimal.html
@@ -2,7 +2,7 @@
 <html>
 
 <head>
-  <meta charset=utf-8/>
+  <meta charset="utf-8"/>
   <meta name="viewport" content="user-scalable=no, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, minimal-ui">
   <title>GraphQL Playground</title>
   <link rel="stylesheet" href="//cdn.jsdelivr.net/npm/graphql-playground-react/build/static/css/index.css" />
@@ -55,4 +55,4 @@
     })</script>
 </body>
 
-</html>
\ No newline at end of file
+</html>
