diff --git a/CHANGELOG.md b/CHANGELOG.md
index a486c98..def669f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -95,4 +95,6 @@
  ### 1.4.7
  * fix: Upgrade message protocol, add message extension topping function and the ability to send expired messages
 ### 1.4.8
- * fix: Upgrade send message api
\ No newline at end of file
+ * fix: Upgrade send message api
+ ### 1.4.9
+ * fix: Upgrade save channel member extra data api
\ No newline at end of file
diff --git a/lib/db/channel_member.dart b/lib/db/channel_member.dart
index 1a54ad8..cc80516 100644
--- a/lib/db/channel_member.dart
+++ b/lib/db/channel_member.dart
@@ -1,3 +1,5 @@
+import 'dart:convert';
+
 import 'package:sqflite/sqflite.dart';
 
 import '../entity/channel_member.dart';
@@ -150,6 +152,9 @@ class ChannelMemberDB {
     map['forbidden_expiration_time'] = member.forbiddenExpirationTime;
     map['created_at'] = member.createdAt;
     map['updated_at'] = member.updatedAt;
+    if (member.extraMap != null) {
+      map['extra'] = jsonEncode(member.extraMap);
+    }
     return map;
   }
 }
diff --git a/pubspec.yaml b/pubspec.yaml
index 0e82442..279c67f 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -15,7 +15,7 @@ description: wukong IM flutter sdk
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
 # In Windows, build-name is used as the major, minor, and patch parts
 # of the product and file versions while build-number is used as the build suffix.
-version: 1.4.8
+version: 1.4.9
 homepage: https://github.com/WuKongIM/WuKongIMFlutterSDK
 
 environment: