diff --git a/js-assembler/package.rkt b/js-assembler/package.rkt
index c9a690b..63e82e5 100644
--- a/js-assembler/package.rkt
+++ b/js-assembler/package.rkt
@@ -328,6 +328,7 @@ MACHINE.modules[~s] =
 <!DOCTYPE html>
 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
   <head>
+    <meta name="viewport" content="initial-scale=1.0, width=device-width, height=device-height, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no" />
     <meta charset="utf-8"/>
     <title>Example</title>
   </head>
