diff --git a/ios-rongcallkit/RongCallKit/Controller/RCCallBaseViewController.m b/ios-rongcallkit/RongCallKit/Controller/RCCallBaseViewController.m
index e32cc6b..46fe885 100644
--- a/ios-rongcallkit/RongCallKit/Controller/RCCallBaseViewController.m
+++ b/ios-rongcallkit/RongCallKit/Controller/RCCallBaseViewController.m
@@ -1182,23 +1182,25 @@ - (void)remoteUserDidJoin:(NSString *)userId
  */
 - (void)remoteUserDidChangeMediaType:(NSString *)userId
                            mediaType:(RCCallMediaType)mediaType {
-  if (!self.callSession.isMultiCall) {
-    if (mediaType == RCCallMediaAudio &&
-        self.callSession.mediaType != RCCallMediaAudio) {
-      if ([self.callSession changeMediaType:RCCallMediaAudio]) {
-        [self.callSession
-            setVideoView:nil
-                  userId:[RCIMClient sharedRCIMClient].currentUserInfo.userId];
-        [self.callSession setVideoView:nil userId:self.callSession.targetId];
-        [self resetLayout:self.callSession.isMultiCall
-                mediaType:RCCallMediaAudio
-               callStatus:self.callSession.callStatus];
+  dispatch_async(dispatch_get_main_queue(), ^{
+    if (!self.callSession.isMultiCall) {
+      if (mediaType == RCCallMediaAudio &&
+          self.callSession.mediaType != RCCallMediaAudio) {
+        if ([self.callSession changeMediaType:RCCallMediaAudio]) {
+          [self.callSession
+           setVideoView:nil
+           userId:[RCIMClient sharedRCIMClient].currentUserInfo.userId];
+          [self.callSession setVideoView:nil userId:self.callSession.targetId];
+          [self resetLayout:self.callSession.isMultiCall
+                  mediaType:RCCallMediaAudio
+                 callStatus:self.callSession.callStatus];
+        }
       }
+    } else if (self.callSession.mediaType == mediaType &&
+               mediaType == RCCallMediaVideo) {
+      [self remoteUserDidDisableCamera:NO byUser:userId];
     }
-  } else if (self.callSession.mediaType == mediaType &&
-             mediaType == RCCallMediaVideo) {
-    [self remoteUserDidDisableCamera:NO byUser:userId];
-  }
+  });
 }
 
 /*!
diff --git a/ios-rongcallkit/RongCallKit/Info.plist b/ios-rongcallkit/RongCallKit/Info.plist
index 0380e07..056dcff 100644
--- a/ios-rongcallkit/RongCallKit/Info.plist
+++ b/ios-rongcallkit/RongCallKit/Info.plist
@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>2.8.19</string>
+	<string>2.8.20</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
diff --git a/ios-rongcallkit/RongCallKit/Utility/RCCallFloatingBoard.m b/ios-rongcallkit/RongCallKit/Utility/RCCallFloatingBoard.m
index ea1b006..cc12fb7 100644
--- a/ios-rongcallkit/RongCallKit/Utility/RCCallFloatingBoard.m
+++ b/ios-rongcallkit/RongCallKit/Utility/RCCallFloatingBoard.m
@@ -458,15 +458,17 @@ - (void)remoteUserDidJoin:(NSString *)userId
  */
 - (void)remoteUserDidChangeMediaType:(NSString *)userId
                            mediaType:(RCCallMediaType)mediaType {
-  if (!self.callSession.isMultiCall) {
-    if (mediaType == RCCallMediaAudio &&
-        self.callSession.mediaType != RCCallMediaAudio) {
-      if ([self.callSession changeMediaType:RCCallMediaAudio]) {
-        [self.videoView removeFromSuperview];
-        [self initBoard];
+  dispatch_async(dispatch_get_main_queue(), ^{
+    if (!self.callSession.isMultiCall) {
+      if (mediaType == RCCallMediaAudio &&
+          self.callSession.mediaType != RCCallMediaAudio) {
+        if ([self.callSession changeMediaType:RCCallMediaAudio]) {
+          [self.videoView removeFromSuperview];
+          [self initBoard];
+        }
       }
     }
-  }
+  });
 }
 
 /*!
diff --git a/ios-rongcallkit/framework/AgoraRtcEngineKit.framework/Modules/module.modulemap b/ios-rongcallkit/framework/AgoraRtcEngineKit.framework/Modules/module.modulemap
new file mode 100644
index 0000000..9f52925
--- /dev/null
+++ b/ios-rongcallkit/framework/AgoraRtcEngineKit.framework/Modules/module.modulemap
@@ -0,0 +1,6 @@
+framework module AgoraRtcEngineKit {
+    umbrella header "AgoraRtcEngineKit.h"
+    
+    export *
+    module * { export * }
+}
diff --git a/ios-rongcallkit/framework/RongCallLib.framework/Info.plist b/ios-rongcallkit/framework/RongCallLib.framework/Info.plist
index 5cf56f0..77dc416 100644
Binary files a/ios-rongcallkit/framework/RongCallLib.framework/Info.plist and b/ios-rongcallkit/framework/RongCallLib.framework/Info.plist differ
diff --git a/ios-rongcallkit/framework/RongCallLib.framework/RongCallLib b/ios-rongcallkit/framework/RongCallLib.framework/RongCallLib
index f84d7b8..2b87da5 100644
Binary files a/ios-rongcallkit/framework/RongCallLib.framework/RongCallLib and b/ios-rongcallkit/framework/RongCallLib.framework/RongCallLib differ
diff --git a/ios-rongcallkit/framework/RongIMKit.framework/Info.plist b/ios-rongcallkit/framework/RongIMKit.framework/Info.plist
index 4a0eac5..4bf7684 100644
Binary files a/ios-rongcallkit/framework/RongIMKit.framework/Info.plist and b/ios-rongcallkit/framework/RongIMKit.framework/Info.plist differ
diff --git a/ios-rongcallkit/framework/RongIMKit.framework/RongIMKit b/ios-rongcallkit/framework/RongIMKit.framework/RongIMKit
index d709993..0588e9e 100644
Binary files a/ios-rongcallkit/framework/RongIMKit.framework/RongIMKit and b/ios-rongcallkit/framework/RongIMKit.framework/RongIMKit differ
diff --git a/ios-rongcallkit/framework/RongIMLib.framework/Headers/RCCustomerServiceConfig.h b/ios-rongcallkit/framework/RongIMLib.framework/Headers/RCCustomerServiceConfig.h
index 1005206..c12933c 100644
--- a/ios-rongcallkit/framework/RongIMLib.framework/Headers/RCCustomerServiceConfig.h
+++ b/ios-rongcallkit/framework/RongIMLib.framework/Headers/RCCustomerServiceConfig.h
@@ -52,7 +52,6 @@
 
 @property(nonatomic) int userTipTime;
 @property(nonatomic, strong) NSString *userTipWord;
-
 /*!
  * 评价时机
  */
diff --git a/ios-rongcallkit/framework/RongIMLib.framework/Info.plist b/ios-rongcallkit/framework/RongIMLib.framework/Info.plist
index 7bf2ab2..947c588 100644
Binary files a/ios-rongcallkit/framework/RongIMLib.framework/Info.plist and b/ios-rongcallkit/framework/RongIMLib.framework/Info.plist differ
diff --git a/ios-rongcallkit/framework/RongIMLib.framework/RongIMLib b/ios-rongcallkit/framework/RongIMLib.framework/RongIMLib
index f5c4c9b..dc6a90a 100644
Binary files a/ios-rongcallkit/framework/RongIMLib.framework/RongIMLib and b/ios-rongcallkit/framework/RongIMLib.framework/RongIMLib differ