diff --git a/main.js b/main.js
index d918ba4..7dcf281 100644
--- a/main.js
+++ b/main.js
@@ -249,10 +249,15 @@ class Handler {
             }
             const body = decodeURIComponent(parameters.body || "NoContent")
 
-            let sound = parameters.sound || '1107'
-            if (!sound.endsWith('.caf')) {
-                sound += '.caf'
+            let sound = parameters.sound || undefined
+            if (sound) {
+                if (!sound.endsWith('.caf')) {
+                    sound += '.caf'
+                }
+            } else {
+                sound = '1107'
             }
+            
             const category = parameters.category || 'myNotificationCategory'
             const group = parameters.group || undefined
             
diff --git a/main_kv.js b/main_kv.js
index 251aa8e..2681d41 100644
--- a/main_kv.js
+++ b/main_kv.js
@@ -129,9 +129,9 @@ async function handleRequest(request, env, ctx) {
 class Handler {
     constructor(env) {
         this.version = "v2.1.3"
-        this.build = "2024-11-22 23:52:47"
+        this.build = "2024-11-23 00:32:33"
         this.arch = "js"
-        this.commit = "73210060060f2d073e29ecec7b895a8ab470a6e7"
+        this.commit = "93807afd5b13feafdc4ef90f3483d4a789696fb3"
 
         const db = new Database(env)
 
@@ -249,10 +249,15 @@ class Handler {
             }
             const body = decodeURIComponent(parameters.body || "NoContent")
 
-            let sound = parameters.sound || '1107'
-            if (!sound.endsWith('.caf')) {
-                sound += '.caf'
+            let sound = parameters.sound || undefined
+            if (sound) {
+                if (!sound.endsWith('.caf')) {
+                    sound += '.caf'
+                }
+            } else {
+                sound = '1107'
             }
+            
             const category = parameters.category || 'myNotificationCategory'
             const group = parameters.group || undefined
             
diff --git a/wrangler.toml b/wrangler.toml
index efb4069..89a71a0 100644
--- a/wrangler.toml
+++ b/wrangler.toml
@@ -1,6 +1,6 @@
 name = "bark-worker"
 main = "main.js"
-compatibility_date = "2024-09-01"
+compatibility_date = "2024-11-01"
 
 [[d1_databases]]
 binding = "database" # available in your Worker on env.database