diff --git a/OpenIM-SDK/build.gradle b/OpenIM-SDK/build.gradle
index f901af6..ccd83f4 100644
--- a/OpenIM-SDK/build.gradle
+++ b/OpenIM-SDK/build.gradle
@@ -34,6 +34,6 @@ dependencies {
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
 
     implementation 'io.openim:client-sdk:2.0.48@aar'
-    implementation 'com.alibaba:fastjson:1.2.24.android'
+    implementation 'com.alibaba:fastjson:1.1.72.android'
 //    implementation 'com.google.code.gson:gson:2.8.7'
 }
diff --git a/OpenIM-SDK/src/main/java/io/openim/android/sdk/listener/OnSignalingListener.java b/OpenIM-SDK/src/main/java/io/openim/android/sdk/listener/OnSignalingListener.java
index 8fd14c4..a0c97e0 100644
--- a/OpenIM-SDK/src/main/java/io/openim/android/sdk/listener/OnSignalingListener.java
+++ b/OpenIM-SDK/src/main/java/io/openim/android/sdk/listener/OnSignalingListener.java
@@ -6,7 +6,6 @@ public interface OnSignalingListener {
 
     void onInvitationCancelled(SignalingInfo s);
 
-
     void onInvitationTimeout(SignalingInfo s);
 
     void onInviteeAccepted(SignalingInfo s);
@@ -18,4 +17,6 @@ public interface OnSignalingListener {
     void onInviteeRejectedByOtherDevice(SignalingInfo s);
 
     void onReceiveNewInvitation(SignalingInfo s);
+
+    void onHangup(SignalingInfo s);
 }
diff --git a/OpenIM-SDK/src/main/java/io/openim/android/sdk/listener/_SignalingListener.java b/OpenIM-SDK/src/main/java/io/openim/android/sdk/listener/_SignalingListener.java
index bab0f01..b6b9772 100644
--- a/OpenIM-SDK/src/main/java/io/openim/android/sdk/listener/_SignalingListener.java
+++ b/OpenIM-SDK/src/main/java/io/openim/android/sdk/listener/_SignalingListener.java
@@ -11,6 +11,14 @@ public _SignalingListener(OnSignalingListener listener) {
         this.listener = listener;
     }
 
+    @Override
+    public void onHangUp(String s) {
+        if (listener != null) {
+            SignalingInfo info = JsonUtil.toObj(s, SignalingInfo.class);
+            listener.onHangup(info);
+        }
+    }
+
     @Override
     public void onInvitationCancelled(String s) {
         if (listener != null) {