diff --git a/index.html b/index.html
index edc792e..8d3d0fc 100644
--- a/index.html
+++ b/index.html
@@ -13,7 +13,7 @@
 <body>
 <div class="container-fluid">
   <div class="row justify-content-center">
-     <div class="col-md-6">
+     <div class="col-lg-6 col-md-9 col-sm-12">
       <div class="card">
     <header class="card-header">
       <h4 class="card-title mt-2">PHP-FPM Process Calculator</h4>
