diff --git a/client-protocol/bean/BaseChatSettingsBean.ts b/client-protocol/bean/BaseChatSettingsBean.ts
new file mode 100644
index 0000000..074b789
--- /dev/null
+++ b/client-protocol/bean/BaseChatSettingsBean.ts
@@ -0,0 +1,5 @@
+interface BaseChatSettings {
+    [key: string]: unknown
+}
+
+export default BaseChatSettings
diff --git a/client-protocol/bean/ChatBean.ts b/client-protocol/bean/ChatBean.ts
index 4b1de08..eabae02 100644
--- a/client-protocol/bean/ChatBean.ts
+++ b/client-protocol/bean/ChatBean.ts
@@ -1,3 +1,4 @@
+import BaseChatSettingsBean from "./BaseChatSettingsBean.ts"
 import ChatType from "./ChatType.ts"
 
 export default class ChatBean {
@@ -5,7 +6,7 @@ export default class ChatBean {
     declare id: string
     declare title: string
     declare avatar_file_hash?: string
-    declare settings?: { [key: string]: unknown }
+    declare settings?: BaseChatSettingsBean
 
     declare is_member: boolean
     declare is_admin: boolean
diff --git a/client-protocol/bean/GroupSettingsBean.ts b/client-protocol/bean/GroupSettingsBean.ts
index 3adface..5ae3f0e 100644
--- a/client-protocol/bean/GroupSettingsBean.ts
+++ b/client-protocol/bean/GroupSettingsBean.ts
@@ -1,4 +1,6 @@
-interface GroupSettingsBean {
+import BaseChatSettings from "./BaseChatSettingsBean.ts"
+
+interface GroupSettingsBean extends BaseChatSettings {
     allow_new_member_join?: boolean
     allow_new_member_from_invitation?: boolean
     new_member_join_method?: 'disabled' | 'allowed_by_admin' | 'answered_and_allowed_by_admin'
@@ -7,8 +9,6 @@ interface GroupSettingsBean {
     // 下面两个比较特殊, 由服务端给予
     group_title: string
     group_name: string
-
-    [key: string]: unknown
 }
 
 export default GroupSettingsBean