diff --git a/README.md b/README.md
index f9a537f..9d3ab3f 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,7 @@ A modern, fast, and fully-featured YouTube-like video streaming platform. Built
 - **Watch History & Suggestions**: Keep track of what you've watched seamlessly! Fully integrated library history tracking.
 - **Subscriptions Management**: Keep up to date with seamless subscription updates for YouTube channels.
 - **Optimized for Safari**: Stutter-free playback algorithms and high-tolerance Hls.js configurations tailored for macOS users.
+- **Background Audio**: Allows videos to continue playing audio when the browser tab is hidden or device locked (perfect for music).
 - **Progressive Web App**: Fully installable PWA out of the box with offline fallbacks and custom vector iconography.
 - **Region Selection**: Tailor your content to specific regions (e.g., Vietnam).
 - **Responsive Design**: Beautiful, mobile-friendly interface with light and dark theme support.
@@ -37,7 +38,7 @@ version: '3.8'
 
 services:
   kv-tube-app:
-    image: git.khoavo.myds.me/vndangkhoa/kv-tube-app:v4.0.3
+    image: git.khoavo.myds.me/vndangkhoa/kv-tube-app:v4.0.4
     container_name: kv-tube-app
     restart: unless-stopped
     ports:
diff --git a/docker-compose.yml b/docker-compose.yml
index 032f96b..39d2d86 100755
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -5,7 +5,7 @@ version: '3.8'
 
 services:
   kv-tube-app:
-    image: git.khoavo.myds.me/vndangkhoa/kv-tube-app:v4.0.3
+    image: git.khoavo.myds.me/vndangkhoa/kv-tube-app:v4.0.4
     container_name: kv-tube-app
     platform: linux/amd64
     restart: unless-stopped
diff --git a/frontend/app/watch/VideoPlayer.tsx b/frontend/app/watch/VideoPlayer.tsx
index 1db02f2..d389575 100755
--- a/frontend/app/watch/VideoPlayer.tsx
+++ b/frontend/app/watch/VideoPlayer.tsx
@@ -97,13 +97,18 @@ export default function VideoPlayer({ videoId, title }: VideoPlayerProps) {
         const audio = audioRef.current;
         if (!video || !audio || !hasSeparateAudio) return;
 
-        // Relax the tolerance to 0.4s to prevent choppy audio resetting on Safari
+        const isHidden = document.visibilityState === 'hidden';
+
         if (Math.abs(video.currentTime - audio.currentTime) > 0.4) {
-            audio.currentTime = video.currentTime;
+            if (!isHidden || !video.paused) {
+                audio.currentTime = video.currentTime;
+            }
         }
 
         if (video.paused && !audio.paused) {
-            audio.pause();
+            if (!isHidden) {
+                audio.pause();
+            }
         } else if (!video.paused && audio.paused) {
             audio.play().catch(() => { });
         }
@@ -189,10 +194,21 @@ export default function VideoPlayer({ videoId, title }: VideoPlayerProps) {
             video.addEventListener(event, handler);
         });
 
+        const handleVisibilityChange = () => {
+            if (document.visibilityState === 'visible' && video && audioRef.current && hasSeparateAudio) {
+                if (video.paused && !audioRef.current.paused) {
+                    video.currentTime = audioRef.current.currentTime;
+                    video.play().catch(() => { });
+                }
+            }
+        };
+        document.addEventListener('visibilitychange', handleVisibilityChange);
+
         return () => {
             Object.entries(handlers).forEach(([event, handler]) => {
                 video.removeEventListener(event, handler);
             });
+            document.removeEventListener('visibilitychange', handleVisibilityChange);
         };
     }, [hasSeparateAudio]);
 
@@ -210,6 +226,24 @@ export default function VideoPlayer({ videoId, title }: VideoPlayerProps) {
         const handleWaiting = () => setIsBuffering(true);
         const handleLoadStart = () => setIsLoading(true);
 
+        if ('mediaSession' in navigator) {
+            navigator.mediaSession.metadata = new MediaMetadata({
+                title: title || 'KV-Tube Video',
+                artist: 'KV-Tube',
+                artwork: [
+                    { src: `https://i.ytimg.com/vi/${videoId}/hqdefault.jpg`, sizes: '480x360', type: 'image/jpeg' }
+                ]
+            });
+            navigator.mediaSession.setActionHandler('play', () => {
+                video.play().catch(() => { });
+                if (needsSeparateAudio && audioRef.current) audioRef.current.play().catch(() => { });
+            });
+            navigator.mediaSession.setActionHandler('pause', () => {
+                video.pause();
+                if (needsSeparateAudio && audioRef.current) audioRef.current.pause();
+            });
+        }
+
         video.addEventListener('canplay', handleCanPlay);
         video.addEventListener('playing', handlePlaying);
         video.addEventListener('waiting', handleWaiting);
diff --git a/frontend/public/apple-touch-icon.png b/frontend/public/apple-touch-icon.png
index 82e74ec..8978f07 100644
Binary files a/frontend/public/apple-touch-icon.png and b/frontend/public/apple-touch-icon.png differ
diff --git a/frontend/public/icon-192x192.png b/frontend/public/icon-192x192.png
index 0f36314..4121ef2 100644
Binary files a/frontend/public/icon-192x192.png and b/frontend/public/icon-192x192.png differ
diff --git a/frontend/public/icon-512x512.png b/frontend/public/icon-512x512.png
index 2c9f9c9..649f657 100644
Binary files a/frontend/public/icon-512x512.png and b/frontend/public/icon-512x512.png differ
diff --git a/frontend/public/kv-tube-logo.png b/frontend/public/kv-tube-logo.png
index 47235c6..32c366a 100644
Binary files a/frontend/public/kv-tube-logo.png and b/frontend/public/kv-tube-logo.png differ