diff --git a/package-lock.json b/package-lock.json
index c6af696d..d719b369 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8624,7 +8624,7 @@
     },
     "packages/webrtc": {
       "name": "werift",
-      "version": "0.18.15",
+      "version": "0.18.16",
       "license": "MIT",
       "dependencies": {
         "@fidm/x509": "^1.2.1",
diff --git a/packages/webrtc/package.json b/packages/webrtc/package.json
index 38f09c1f..5b6d48c0 100644
--- a/packages/webrtc/package.json
+++ b/packages/webrtc/package.json
@@ -1,6 +1,6 @@
 {
   "name": "werift",
-  "version": "0.18.15",
+  "version": "0.18.16",
   "description": "WebRTC Implementation for TypeScript (Node.js)",
   "keywords": [
     "WebRTC",
diff --git a/packages/webrtc/src/media/rtpSender.ts b/packages/webrtc/src/media/rtpSender.ts
index 4a07a4fb..94c4a351 100644
--- a/packages/webrtc/src/media/rtpSender.ts
+++ b/packages/webrtc/src/media/rtpSender.ts
@@ -327,6 +327,7 @@ export class RTCRtpSender {
 
     const ntpTimestamp = ntpTime();
 
+    const originalHeaderExtensions = [...header.extensions];
     header.extensions = this.headerExtensions
       .map((extension) => {
         const payload = (() => {
@@ -364,6 +365,15 @@ export class RTCRtpSender {
         if (payload) return { id: extension.id, payload };
       })
       .filter((v) => v) as Extension[];
+    for (const ext of originalHeaderExtensions) {
+      const exist = header.extensions.find((v) => v.id === ext.id);
+      if (exist) {
+        exist.payload = ext.payload;
+      } else {
+        header.extensions.push(ext);
+      }
+    }
+    header.extensions = header.extensions.sort((a, b) => a.id - b.id);
 
     this.ntpTimestamp = ntpTimestamp;
     this.rtpTimestamp = header.timestamp;