diff --git a/_includes/layouts/main.tsx b/_includes/layouts/main.tsx
index 3169904..95a6e2a 100644
--- a/_includes/layouts/main.tsx
+++ b/_includes/layouts/main.tsx
@@ -4,6 +4,7 @@ export default function({ title, children }) {
       <head>
         <meta charSet="utf-8"/>
         <title>{ title }</title>
+        <meta name="viewport" content="width=device-width, initial-scale=1.0"/>
         <link rel="stylesheet" href="styles/main.css"/>
       </head>
       <body>
