diff --git a/README.md b/README.md
index 663a34a..c24ad52 100644
--- a/README.md
+++ b/README.md
@@ -17,6 +17,10 @@ Sends a system notification via the browser.
 
 Plays a chime sound to notify the user.
 
+By default, the selected sound file is at [`custom_nodes/ComfyUI-Notifications/web/assets/notify.mp3`](web/assets/). You can add custom sounds to this directory and change the file name in the node settings to play a different sound.
+
+Alternatively, you can use a URL to an audio file. Simply enter the URL in the `file` field.
+
 <img src="assets/play_sound_node.jpg" width="400"/>
 
 
diff --git a/web/util.js b/web/util.js
index ff223ae..673edd1 100644
--- a/web/util.js
+++ b/web/util.js
@@ -29,7 +29,7 @@ export const playSound = (file, volume) => {
     if (!file) {
         file = 'notify.mp3'
     }
-    if (!file.startsWith('http')) {
+    if (!(file.startsWith('http') || file.startsWith('https'))) {
         if (!file.includes('/')) {
             file = 'assets/' + file
         }