diff --git a/src/playground/index.ejs b/src/playground/index.ejs
index 358f33e5..5d66a8e9 100644
--- a/src/playground/index.ejs
+++ b/src/playground/index.ejs
@@ -4,7 +4,11 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <title><%= htmlWebpackPlugin.options.title %></title>
-    <style>body { font-family: "Helvetica Neue", Helvetica, Arial, sans-serif; }</style>
+    <style>
+      body {
+        font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
+      }
+    </style>
   </head>
   <body>
   </body>
