diff --git a/core/CHANGELOG.md b/core/CHANGELOG.md
index 080ebd9..1435522 100644
--- a/core/CHANGELOG.md
+++ b/core/CHANGELOG.md
@@ -1,3 +1,7 @@
+v1.1.14
+
+- Added `SystemMessageDetail` type.
+
 v1.1.13
 
 - Fixed `channelStartTyping` and `channelStopTyping` events returning incorrect arguments.
diff --git a/core/package.json b/core/package.json
index 3d4b5e6..d3f7e3a 100644
--- a/core/package.json
+++ b/core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "revkit",
-  "version": "1.1.13",
+  "version": "1.1.14",
   "description": "An alternative to revolt.js that aims to be familiar to use.",
   "main": "dist/cjs/index.js",
   "module": "dist/es6/index.js",
diff --git a/core/src/objects/SystemMessage.ts b/core/src/objects/SystemMessage.ts
index decef00..92e87b7 100644
--- a/core/src/objects/SystemMessage.ts
+++ b/core/src/objects/SystemMessage.ts
@@ -3,23 +3,25 @@ import { Client } from "../Client";
 import { BaseMessage } from "./BaseMessage";
 import { User } from "./User";
 
+export type SystemMessageDetail =
+  | { type: SystemMessageType.Text; content: string }
+  | { type: SystemMessageType.GroupDescriptionChange; by: User }
+  | { type: SystemMessageType.GroupIconChange; by: User }
+  | { type: SystemMessageType.GroupOwnershipChange; from: User; to: User }
+  | { type: SystemMessageType.GroupRenamed; name: string; by: User }
+  | { type: SystemMessageType.UserAdded; user: User; by: User }
+  | { type: SystemMessageType.UserBanned; user: User }
+  | { type: SystemMessageType.UserJoined; user: User }
+  | { type: SystemMessageType.UserKicked; user: User }
+  | { type: SystemMessageType.UserLeft; user: User }
+  | { type: SystemMessageType.UserRemoved; user: User; by: User };
+
 export class SystemMessage extends BaseMessage {
   constructor(client: Client, data: APIMessage) {
     super(client, data);
   }
 
-  public get detail():
-    | { type: SystemMessageType.Text; content: string }
-    | { type: SystemMessageType.UserAdded; user: User; by: User }
-    | { type: SystemMessageType.UserRemoved; user: User; by: User }
-    | { type: SystemMessageType.UserJoined; user: User }
-    | { type: SystemMessageType.UserLeft; user: User }
-    | { type: SystemMessageType.UserKicked; user: User }
-    | { type: SystemMessageType.UserBanned; user: User }
-    | { type: SystemMessageType.GroupRenamed; name: string; by: User }
-    | { type: SystemMessageType.GroupDescriptionChange; by: User }
-    | { type: SystemMessageType.GroupIconChange; by: User }
-    | { type: SystemMessageType.GroupOwnershipChange; from: User; to: User } {
+  public get detail(): SystemMessageDetail {
     const sys = this.source.system,
       get = (id: string) => this.client.users.get(id);