diff --git a/gravity.php b/gravity.php
new file mode 100644
index 00000000..d33055af
--- /dev/null
+++ b/gravity.php
@@ -0,0 +1,33 @@
+<?php
+    require "header.php";
+?>
+<!-- Send PHP info to JS -->
+<div id="token" hidden><?php echo $token ?></div>
+
+<!-- Title -->
+<div class="page-header">
+    <h1>Update list of ad-serving domains</h1>
+</div>
+
+<!-- Alerts -->
+<div id="alInfo" class="alert alert-info alert-dismissible fade in" role="alert" hidden="true">
+    <button type="button" class="close" data-hide="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
+    Updating...
+</div>
+<div id="alSuccess" class="alert alert-success alert-dismissible fade in" role="alert" hidden="true">
+    <button type="button" class="close" data-hide="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
+    Success!
+</div>
+<div id="alFailure" class="alert alert-danger alert-dismissible fade in" role="alert" hidden="true">
+    <button type="button" class="close" data-hide="alert" aria-label="Close"><span aria-hidden="true">&times;</span></button>
+    Failure! Something went wrong.
+</div>
+
+<pre id="output" style="width: 100%; height: 100%;"></pre>
+
+<?php
+    require "footer.php";
+?>
+
+
+<script src="js/pihole/gravity.js"></script>
diff --git a/header.php b/header.php
index b42815ca..4412914f 100644
--- a/header.php
+++ b/header.php
@@ -235,6 +235,12 @@
                         <i class="fa fa-ban"></i> <span>Blacklist</span>
                     </a>
                 </li>
+                <!-- Run gravity.sh -->
+                <li>
+                    <a href="gravity.php">
+                        <i class="fa fa-arrow-circle-down"></i> <span>Update lists</span>
+                    </a>
+                </li>
                 <!-- Toggle -->
                 <?php
                 if ($pistatus == "1") {
diff --git a/js/pihole/gravity.js b/js/pihole/gravity.js
new file mode 100644
index 00000000..e3ce2f68
--- /dev/null
+++ b/js/pihole/gravity.js
@@ -0,0 +1,34 @@
+function eventsourcetest() {
+    var alInfo = $("#alInfo");
+    var alSuccess = $("#alSuccess");
+    var alFailure = $("#alFailure");
+    var ta = document.getElementById('output');
+    var source = new EventSource('php/gravity.sh.php');
+
+    alInfo.show();
+    alSuccess.hide();
+    alFailure.hide();
+
+    source.addEventListener('message', function(e) {
+        if(e.data == "START"){
+           alInfo.show();
+        }
+        else if(e.data == "SUCCESS"){
+           alSuccess.show();
+           alInfo.delay(5000).fadeOut(2000, function() { alInfo.hide(); });
+        }
+        else if (e.data !== '')
+        {
+            ta.innerHTML += e.data;
+        }
+    }, false);
+
+    source.addEventListener('error', function(e) {
+        source.close();
+        alFailure.show();
+        alInfo.delay(5000).fadeOut(2000, function() { alInfo.hide(); });
+    }, false);
+}
+$(function(){
+   eventsourcetest();
+});
diff --git a/php/gravity.sh.php b/php/gravity.sh.php
new file mode 100644
index 00000000..f55a049a
--- /dev/null
+++ b/php/gravity.sh.php
@@ -0,0 +1,19 @@
+<?php
+ob_end_flush();
+ini_set("output_buffering", "0");
+ob_implicit_flush(true);
+header('Content-Type: text/event-stream');
+header('Cache-Control: no-cache');
+
+function echoEvent($datatext) {
+    echo "data: ".implode("\ndata: ", explode("\n", $datatext))."\n\n";
+}
+
+echoEvent("START");
+
+$proc = popen("sudo pihole -g", 'r');
+while (!feof($proc)) {
+    echoEvent(fread($proc, 4096));
+}
+
+echoEvent("SUCCESS");