diff --git a/debian/control b/debian/control
index 6801a41a5..f05ca8b2f 100644
--- a/debian/control
+++ b/debian/control
@@ -101,7 +101,6 @@ Depends:
  libglib2.0-bin,
  libjs-bootstrap4,
  libjs-jquery,
- libjs-modernizr,
  lsof,
  netcat-openbsd,
  network-manager,
diff --git a/plinth/templates/base.html b/plinth/templates/base.html
index e86199692..3bc8e83a5 100644
--- a/plinth/templates/base.html
+++ b/plinth/templates/base.html
@@ -7,7 +7,7 @@
 {% endcomment %}
 <!doctype html>
 <html class="no-js" lang="en">
-<!-- the "no-js" class is for Modernizr -->
+<!-- the "no-js" class will be removed if Javascript is turned on -->
 <head>
   <meta charset="utf-8" />
 
@@ -54,8 +54,6 @@
   <link rel="stylesheet" href="{% static '/javascript/bootstrap4/css/bootstrap.min.css' %}"/>
   <link rel="stylesheet" href="{% static '/javascript/fork-awesome/css/fork-awesome.css' %}"/>
   <link rel="stylesheet" href="{% static 'theme/css/main.css' %}"/>
-  <!-- Local link to system Modernizr (includes HTML5 Shiv) -->
-  <script type="text/javascript" src="{% static '/javascript/modernizr/modernizr.min.js' %}" defer></script>
   <!-- Local link to system jQuery -->
   <!-- TODO Deferring jQuery is causing scripts to be loaded before jQuery is available -->
   <script type="text/javascript" src="{% static '/javascript/jquery/jquery.min.js' %}"></script>
diff --git a/static/jslicense.html b/static/jslicense.html
index 22a9808fc..00ffac34e 100644
--- a/static/jslicense.html
+++ b/static/jslicense.html
@@ -25,13 +25,6 @@
           <td><a href="https://salsa.debian.org/js-team/twitter-bootstrap3.git">
             twitter-bootstap3</a></td>
         </tr>
-        <tr>
-          <td><a href="/javascript/modernizr/modernizr.min.js">
-            modernizr.min.js</a></td>
-          <td><a href="http://www.jclark.com/xml/copying.txt">Expat</a></td>
-          <td><a href="https://salsa.debian.org/js-team/modernizr.git">
-            modernizr</a></td>
-        </tr>
         <tr>
           <td><a href="/plinth/static/jsxc/jsxc-plinth.js">jsxc-plinth.js</a></td>
           <td>
diff --git a/static/themes/default/js/main.js b/static/themes/default/js/main.js
index 412ad493a..eaeb86b03 100644
--- a/static/themes/default/js/main.js
+++ b/static/themes/default/js/main.js
@@ -22,6 +22,17 @@
   for the JavaScript code in this page.
 */
 
+/*
+ * Remove the 'no-js' class from the <body> element. CSS utilizing this can
+ * create different rules when Javascript is available and when it is not. This
+ * functionality was provided by the Modernizr library earlier.
+ */
+document.addEventListener('DOMContentLoaded', function(event) {
+    const html = document.querySelector('html');
+    html.classList.remove('no-js');
+    html.classList.add('js');
+});
+
 /*
  * Refresh page if marked for refresh.
  */
