diff --git a/NEWS.md b/NEWS.md
index cb95323c..0eb5a0d9 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,11 @@
+2017-11-15
+==========
+
+The Google Drive userscript has been updated due to breaking changes in
+Greasemonkey 4.0.  Remember to generate the script by running:
+
+    $ npm run generate-userscript "Your Site Name" http://your-site.example.com/r/*
+
 2017-11-05
 ==========
 
diff --git a/gdrive-userscript/cytube-google-drive.user.js b/gdrive-userscript/cytube-google-drive.user.js
index 2d094956..e2efe323 100644
--- a/gdrive-userscript/cytube-google-drive.user.js
+++ b/gdrive-userscript/cytube-google-drive.user.js
@@ -3,11 +3,13 @@
 // @namespace gdcytube
 // @description Play Google Drive videos on {SITENAME}
 // {INCLUDE_BLOCK}
+// @require https://greasemonkey.github.io/gm4-polyfill/gm4-polyfill.js
 // @grant unsafeWindow
 // @grant GM_xmlhttpRequest
+// @grant GM.xmlHttpRequest
 // @connect docs.google.com
 // @run-at document-end
-// @version 1.3.0
+// @version 1.4.0
 // ==/UserScript==
 
 try {
@@ -56,7 +58,7 @@ try {
                 + '&hl=en';
         debug('Fetching ' + url);
 
-        GM_xmlhttpRequest({
+        GM.xmlHttpRequest({
             method: 'GET',
             url: url,
             onload: function (res) {
@@ -100,6 +102,9 @@ try {
                 error.reason = 'HTTP_ONERROR';
                 return cb(error);
             }
+        }).catch(function (error) {
+            error.reason = 'GM.xmlHttpRequest error';
+            return cb(error);
         });
     }
 
@@ -204,7 +209,7 @@ try {
 
     unsafeWindow.console.log('Initialized userscript Google Drive player');
     unsafeWindow.hasDriveUserscript = true;
-    unsafeWindow.driveUserscriptVersion = '1.3';
+    unsafeWindow.driveUserscriptVersion = '1.4';
 } catch (error) {
     unsafeWindow.console.error(error);
 }
diff --git a/package.json b/package.json
index 7fdf8f35..5f98bbd4 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "author": "Calvin Montgomery",
   "name": "CyTube",
   "description": "Online media synchronizer and chat",
-  "version": "3.51.3",
+  "version": "3.51.4",
   "repository": {
     "url": "http://github.com/calzoneman/sync"
   },
diff --git a/www/js/util.js b/www/js/util.js
index 98d88c8a..594c2a92 100644
--- a/www/js/util.js
+++ b/www/js/util.js
@@ -3247,7 +3247,7 @@ function maybePromptToUpgradeUserscript() {
         return;
     }
 
-    var currentVersion = [1, 3];
+    var currentVersion = [1, 4];
     var userscriptVersion = window.driveUserscriptVersion;
     if (!userscriptVersion) {
         userscriptVersion = '1.0';