diff --git a/src/core/types/webapi.ts b/src/core/types/webapi.ts
index c689d860..c9771cba 100644
--- a/src/core/types/webapi.ts
+++ b/src/core/types/webapi.ts
@@ -115,7 +115,7 @@ export interface GroupEssenceMsg {
     add_digest_uin: string;
     add_digest_nick: string;
     add_digest_time: number;
-    msg_content: unknown[];
+    msg_content: { msg_type: number, text?: string, image_url?: string }[];
     can_be_removed: true;
 }