diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..e2d591f
Binary files /dev/null and b/.DS_Store differ
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2845032..e647ce0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,12 +2,15 @@
 
 * TODO: Describe initial release.
 
-### 0.0.2
+## 0.0.2
 
 1，将 markSingleMessageHasRead、markGroupMessageHasRead和getTotalUnreadMsgCount方法从类MessageManager移动到类ConversationManager。</br>
 2，修改setFriendInfo方法的参数。</br>
 3，修改createGroup和setGroupInfo方法的参数。
 
-### 0.0.3
-    upgrade sdk </br>
-    fix bug </br>
+## 0.0.3
+upgrade sdk </br>
+fix bug </br>
+
+## 0.0.4
+将createCustomMessage方法入参从Uint8List替换为Map
\ No newline at end of file
diff --git a/android/src/main/java/io/openim/flutter_openim_sdk/util/CommonUtil.java b/android/src/main/java/io/openim/flutter_openim_sdk/util/CommonUtil.java
index b8aedff..6590d01 100644
--- a/android/src/main/java/io/openim/flutter_openim_sdk/util/CommonUtil.java
+++ b/android/src/main/java/io/openim/flutter_openim_sdk/util/CommonUtil.java
@@ -276,12 +276,12 @@ public class CommonUtil {
         return getParamValue(methodCall, KEY_MESSAGE_DES);
     }
 
-    public static byte[] getCustomMessageData(MethodCall methodCall) {
-        return getParamValue(methodCall, KEY_CUSTOM_MESSAGE_DATA);
+    public static String getCustomMessageData(MethodCall methodCall) {
+        return getSDKJsonParam(methodCall, KEY_CUSTOM_MESSAGE_DATA);
     }
 
-    public static byte[] getCustomMessageExt(MethodCall methodCall) {
-        return getParamValue(methodCall, KEY_CUSTOM_MESSAGE_EXT);
+    public static String getCustomMessageExt(MethodCall methodCall) {
+        return getSDKJsonParam(methodCall, KEY_CUSTOM_MESSAGE_EXT);
     }
 
     public static String getQuoteMessageText(MethodCall methodCall) {
diff --git a/example/pubspec.lock b/example/pubspec.lock
index de2c0d4..e54f1d3 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -68,7 +68,7 @@ packages:
       path: ".."
       relative: true
     source: path
-    version: "0.0.2"
+    version: "0.0.4"
   flutter_test:
     dependency: "direct dev"
     description: flutter
diff --git a/lib/.DS_Store b/lib/.DS_Store
new file mode 100644
index 0000000..84ae108
Binary files /dev/null and b/lib/.DS_Store differ
diff --git a/lib/src/manager/im_message_manager.dart b/lib/src/manager/im_message_manager.dart
index 2a1cc79..af91fee 100644
--- a/lib/src/manager/im_message_manager.dart
+++ b/lib/src/manager/im_message_manager.dart
@@ -1,5 +1,4 @@
 import 'dart:convert';
-import 'dart:typed_data';
 
 import 'package:flutter/services.dart';
 import 'package:flutter_openim_sdk/flutter_openim_sdk.dart';
@@ -318,8 +317,8 @@ class MessageManager {
 
   ///
   Future<Message> createCustomMessage({
-    required Uint8List data,
-    required Uint8List extension,
+    required Map<String, dynamic> data,
+    required Map<String, dynamic> extension,
     required String description,
   }) {
     return _channel
diff --git a/pubspec.yaml b/pubspec.yaml
index dfce4b0..0798bf6 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: flutter_openim_sdk
 description: openim flutter plugin.
-version: 0.0.3
+version: 0.0.4
 homepage: https://www.rentsoft.cn
 repository: https://github.com/OpenIMSDK/Open-IM-SDK-Flutter