diff --git a/calculator.html b/calculator.html
index 89eb392..16eb161 100644
--- a/calculator.html
+++ b/calculator.html
@@ -2,6 +2,7 @@
 <html lang="en">
 <head>
     <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width,initial-scale=1.0">
     <title>Calculator Responsive HTML Template</title>
     <style>
         /* change theme here */
@@ -55,4 +56,4 @@
         </div>
     </div>
 </body>
-</html>
\ No newline at end of file
+</html>
