diff --git a/docs/css.html b/docs/css.html
index 9684d778c3..aec71a4f48 100644
--- a/docs/css.html
+++ b/docs/css.html
@@ -1949,7 +1949,7 @@ For example, <code>&lt;section&gt;</code> should be wrapped as inline.
     <p class="lead">For faster mobile-friendly development, use these utility classes for showing and hiding content by device via media query. Also included are utility classes for toggling content when printed.</p>
 
     <h3>Responsive classes</h3>
-    <table class="table table-bordered table-striped responsive-utilities hidden-phone">
+    <table class="table table-bordered table-striped responsive-utilities hidden-sm">
       <thead>
         <tr>
           <th>Class</th>
@@ -1960,37 +1960,37 @@ For example, <code>&lt;section&gt;</code> should be wrapped as inline.
       </thead>
       <tbody>
         <tr>
-          <th><code>.visible-phone</code></th>
+          <th><code>.visible-sm</code></th>
           <td class="is-visible">Visible</td>
           <td class="is-hidden">Hidden</td>
           <td class="is-hidden">Hidden</td>
         </tr>
         <tr>
-          <th><code>.visible-tablet</code></th>
+          <th><code>.visible-md</code></th>
           <td class="is-hidden">Hidden</td>
           <td class="is-visible">Visible</td>
           <td class="is-hidden">Hidden</td>
         </tr>
         <tr>
-          <th><code>.visible-desktop</code></th>
+          <th><code>.visible-lg</code></th>
           <td class="is-hidden">Hidden</td>
           <td class="is-hidden">Hidden</td>
           <td class="is-visible">Visible</td>
         </tr>
         <tr>
-          <th><code>.hidden-phone</code></th>
+          <th><code>.hidden-sm</code></th>
           <td class="is-hidden">Hidden</td>
           <td class="is-visible">Visible</td>
           <td class="is-visible">Visible</td>
         </tr>
         <tr>
-          <th><code>.hidden-tablet</code></th>
+          <th><code>.hidden-md</code></th>
           <td class="is-visible">Visible</td>
           <td class="is-hidden">Hidden</td>
           <td class="is-visible">Visible</td>
         </tr>
         <tr>
-          <th><code>.hidden-desktop</code></th>
+          <th><code>.hidden-lg</code></th>
           <td class="is-visible">Visible</td>
           <td class="is-visible">Visible</td>
           <td class="is-hidden">Hidden</td>
@@ -2029,16 +2029,16 @@ For example, <code>&lt;section&gt;</code> should be wrapped as inline.
     <h4>Visible on...</h4>
     <p>Green checkmarks indicate that class is visible in your current viewport.</p>
     <ul class="responsive-utilities-test">
-      <li>Phone<span class="visible-phone">&#10004; Phone</span></li>
-      <li>Tablet<span class="visible-tablet">&#10004; Tablet</span></li>
-      <li>Desktop<span class="visible-desktop">&#10004; Desktop</span></li>
+      <li>Phone<span class="visible-sm">&#10004; Phone</span></li>
+      <li>Tablet<span class="visible-md">&#10004; Tablet</span></li>
+      <li>Desktop<span class="visible-lg">&#10004; Desktop</span></li>
     </ul>
     <h4>Hidden on...</h4>
     <p>Here, green checkmarks indicate that class is hidden in your current viewport.</p>
     <ul class="responsive-utilities-test hidden-on">
-      <li>Phone<span class="hidden-phone">&#10004; Phone</span></li>
-      <li>Tablet<span class="hidden-tablet">&#10004; Tablet</span></li>
-      <li>Desktop<span class="hidden-desktop">&#10004; Desktop</span></li>
+      <li>Phone<span class="hidden-sm">&#10004; Phone</span></li>
+      <li>Tablet<span class="hidden-md">&#10004; Tablet</span></li>
+      <li>Desktop<span class="hidden-lg">&#10004; Desktop</span></li>
     </ul>
 
   </div>