diff --git a/server/views/404Page.js b/server/views/404Page.js
index 3d92ee13..10f61cd0 100644
--- a/server/views/404Page.js
+++ b/server/views/404Page.js
@@ -43,6 +43,7 @@ export function get404Sketch(callback) {
         html[0] = `
           ${html[0]}
           <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+          <meta name="viewport" content="width=device-width, initial-scale=1.0">
           <meta name="keywords" content="p5.js, p5.js web editor, web editor, processing, code editor" />
           <meta name="description" content="A web editor for p5.js, a JavaScript library with the goal of making coding accessible to artists, designers, educators, and beginners." />
           <title>404 Page Not Found - p5.js Web Editor</title>
diff --git a/server/views/index.js b/server/views/index.js
index 8d385f07..8f4bf6e8 100644
--- a/server/views/index.js
+++ b/server/views/index.js
@@ -7,6 +7,7 @@ export function renderIndex() {
   <html>
     <head>
       <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
+      <meta name="viewport" content="width=device-width, initial-scale=1.0">
       <meta name="keywords" content="p5.js, p5.js web editor, web editor, processing, code editor" />
       <meta name="description" content="A web editor for p5.js, a JavaScript library with the goal of making coding accessible to artists, designers, educators, and beginners." />
       <title>p5.js Web Editor</title>
