diff --git a/broker/migrate/h2/V31__add_group_member_count_history_message.sql b/broker/migrate/h2/V31__add_group_member_count_history_message.sql
new file mode 100755
index 00000000..3ca5e113
--- /dev/null
+++ b/broker/migrate/h2/V31__add_group_member_count_history_message.sql
@@ -0,0 +1,2 @@
+alter table `t_group` add column `_history_message` tinyint NOT NULL DEFAULT 0;
+alter table `t_group` add column `_max_member_count` int(11) NOT NULL DEFAULT 2000;
diff --git a/broker/migrate/mysql/V36__add_group_member_count_history_message.sql b/broker/migrate/mysql/V36__add_group_member_count_history_message.sql
new file mode 100755
index 00000000..948c5f9a
--- /dev/null
+++ b/broker/migrate/mysql/V36__add_group_member_count_history_message.sql
@@ -0,0 +1,2 @@
+alter table `t_group` add column `_history_message` tinyint NOT NULL DEFAULT 0, COMMENT "new group member can load group history messages";
+alter table `t_group` add column `_max_member_count` int(11) NOT NULL DEFAULT 2000, COMMENT "max group member count",
diff --git a/sdk/src/main/java/cn/wildfirechat/sdk/GroupAdmin.java b/sdk/src/main/java/cn/wildfirechat/sdk/GroupAdmin.java
index fae8a5b2..ae3466f7 100644
--- a/sdk/src/main/java/cn/wildfirechat/sdk/GroupAdmin.java
+++ b/sdk/src/main/java/cn/wildfirechat/sdk/GroupAdmin.java
@@ -52,7 +52,7 @@ public class GroupAdmin {
         return AdminHttpUtils.httpJsonPost(path, transferGroup, Void.class);
     }
 
-    public static IMResult<Void> modifyGroupInfo(String operator, String groupId, int type, String value, List<Integer> to_lines, MessagePayload  notify_message) throws Exception {
+    public static IMResult<Void> modifyGroupInfo(String operator, String groupId, /*ModifyGroupInfoType*/int type, String value, List<Integer> to_lines, MessagePayload  notify_message) throws Exception {
         String path = APIPath.Group_Modify_Info;
         InputModifyGroupInfo modifyGroupInfo = new InputModifyGroupInfo();
         modifyGroupInfo.setGroup_id(groupId);