diff --git a/shared/extensions-marketplace/virtual-background/project-implementation/web.mdx b/shared/extensions-marketplace/virtual-background/project-implementation/web.mdx
index 6afd605f3..0d15d291d 100644
--- a/shared/extensions-marketplace/virtual-background/project-implementation/web.mdx
+++ b/shared/extensions-marketplace/virtual-background/project-implementation/web.mdx
@@ -6,7 +6,7 @@ Integrate the virtual background extension, and implement the virtual background
 
    ```typescript
     // Create a client object
-    var client = AgoraRTC.createClient({mode: "rtc", codec: "vp8"});
+    var client = AgoraRTC.createClient({mode: "rtc", codec: "vp9"});
     // Create a VirtualBackgroundExtension instance
     const extension = new VirtualBackgroundExtension();
     // Check browser compatibility virtual background extension
diff --git a/shared/extensions-marketplace/virtual-background/reference/web.mdx b/shared/extensions-marketplace/virtual-background/reference/web.mdx
index ec47a50d5..f4b1bf388 100644
--- a/shared/extensions-marketplace/virtual-background/reference/web.mdx
+++ b/shared/extensions-marketplace/virtual-background/reference/web.mdx
@@ -7,7 +7,7 @@ import AgoraRTC from "agora-rtc-sdk-ng";
 import VirtualBackgroundExtension from "agora-extension-virtual-background";
 
 // Create a client object
-var client = AgoraRTC.createClient({mode: "rtc", codec: "vp8"});
+var client = AgoraRTC.createClient({mode: "rtc", codec: "vp9"});
 // Create a VirtualBackgroundExtension instance
 const extension = new VirtualBackgroundExtension();
 // Register the extension
diff --git a/shared/media-pull/reference/_release-notes.mdx b/shared/media-pull/reference/_release-notes.mdx
index 89e6d44b4..94192b6a1 100644
--- a/shared/media-pull/reference/_release-notes.mdx
+++ b/shared/media-pull/reference/_release-notes.mdx
@@ -26,4 +26,4 @@ The changes for earlier releases include adding support for the following:
 - Streaming encapsulation formats: FLV, MP4, MPEG-TS, Matroska (MKV), MP3.
 - Playback scheduling. Set the start time of playing online media streams to schedule playback.
 - Restricted access area. Specify the region where the online media stream is played in the request, to ensure the transmission quality of the media stream.
-- On-demand stream loop playback.
\ No newline at end of file
+- On-demand stream loop playback.