diff --git a/src/jupyter_contrib_nbextensions/nbextensions/notify/notify.js b/src/jupyter_contrib_nbextensions/nbextensions/notify/notify.js
index bdff5a9..579cf0c 100644
--- a/src/jupyter_contrib_nbextensions/nbextensions/notify/notify.js
+++ b/src/jupyter_contrib_nbextensions/nbextensions/notify/notify.js
@@ -12,12 +12,12 @@ define([
   "jquery",
   "base/js/namespace",
   "require",
-], function ($, IPython, require) {
+], function ($, Jupyter, require) {
   "use strict";
 
   var params = {
     sticky: false,
-    sound: false
+    play_sound: false
   };
 
   var current_time = function() {
@@ -63,7 +63,7 @@ define([
 
   var add_permissions_button = function () {
     if ($("#permissions-button").length === 0) {
-      IPython.toolbar.add_buttons_group([
+      Jupyter.toolbar.add_buttons_group([
         {
           'label'   : 'Grant Notification Permissions',
           'icon'    : 'fa-check',
@@ -106,13 +106,13 @@ define([
     if (enabled && !first_start && !busy_kernel && elapsed_time >= min_time) {
       var opts = {
         body: "Kernel is now idle\n(ran for " + Math.round(elapsed_time) + " secs)",
-        icon: "/static/base/images/favicon.ico",
+        icon: Jupyter.notebook.base_url + "static/base/images/favicon.ico",
         requireInteraction: params.sticky
       };
       if (params.sound) {
         opts["sound"] = require.toUrl("./notify.mp3");
       }
-      var n = new Notification(IPython.notebook.notebook_name, opts);
+      var n = new Notification(Jupyter.notebook.notebook_name, opts);
       n.onclick = function(event){ window.focus(); }
     }
     if (first_start) {
@@ -121,24 +121,24 @@ define([
   };
 
   var load_state = function () {
-    if (!IPython.notebook) return;
+    if (!Jupyter.notebook) return;
 
-    if ("notify_time" in IPython.notebook.metadata) {
-      min_time = IPython.notebook.metadata.notify_time;
+    if ("notify_time" in Jupyter.notebook.metadata) {
+      min_time = Jupyter.notebook.metadata.notify_time;
       enabled = true;
     }
   };
 
   var save_state = function () {
     if (enabled) {
-      if (IPython.notebook.metadata.notify_time !== min_time) {
-        IPython.notebook.metadata.notify_time = min_time;
-        IPython.notebook.set_dirty();
+      if (Jupyter.notebook.metadata.notify_time !== min_time) {
+        Jupyter.notebook.metadata.notify_time = min_time;
+        Jupyter.notebook.set_dirty();
       }
     } else {
-      if (IPython.notebook.metadata.hasOwnProperty('notify_time')) {
-        delete IPython.notebook.metadata.notify_time;
-        IPython.notebook.set_dirty();
+      if (Jupyter.notebook.metadata.hasOwnProperty('notify_time')) {
+        delete Jupyter.notebook.metadata.notify_time;
+        Jupyter.notebook.set_dirty();
       }
     }
   };
@@ -156,16 +156,16 @@ define([
   };
 
   var setup_notifier = function () {
-    $([IPython.events]).on('kernel_starting.Kernel',function () {
+    $([Jupyter.events]).on('kernel_starting.Kernel',function () {
       first_start = true;  // reset first_start status when restarting the kernel
     });
 
-    $([IPython.events]).on('kernel_busy.Kernel',function () {
+    $([Jupyter.events]).on('kernel_busy.Kernel',function () {
       busy_kernel = true;
       start_time = current_time();  // reset the timer
     });
 
-    $([IPython.events]).on('kernel_idle.Kernel',function () {
+    $([Jupyter.events]).on('kernel_idle.Kernel',function () {
       busy_kernel = false;  // Used to make sure that kernel doesn't go busy again within the timeout set below.
       setTimeout(notify, 500);
     });
diff --git a/src/jupyter_contrib_nbextensions/nbextensions/notify/notify.yaml b/src/jupyter_contrib_nbextensions/nbextensions/notify/notify.yaml
index ef57ac3..893ea5c 100644
--- a/src/jupyter_contrib_nbextensions/nbextensions/notify/notify.yaml
+++ b/src/jupyter_contrib_nbextensions/nbextensions/notify/notify.yaml
@@ -12,7 +12,7 @@ Parameters:
   description: Require interactions on notifications to dismiss them. (Chrome only)
   input_type: checkbox
   default: false
-- name: notify.sound
+- name: notify.play_sound
   description: Play notification sound. (Not yet supported in browsers)
   input_type: checkbox
   default: false