diff --git a/src/core/services/NodeIKernelGroupService.ts b/src/core/services/NodeIKernelGroupService.ts
index b9eba01b..d5684800 100644
--- a/src/core/services/NodeIKernelGroupService.ts
+++ b/src/core/services/NodeIKernelGroupService.ts
@@ -89,7 +89,7 @@ export interface NodeIKernelGroupService {
 
     isEssenceMsg(req: { groupCode: string, msgRandom: number, msgSeq: number }): Promise<unknown>;
 
-    queryCachedEssenceMsg(req: { groupCode: string, msgRandom: number, msgSeq: number }): Promise<{items:Array<unknown>}>;
+    queryCachedEssenceMsg(req: { groupCode: string, msgRandom: number, msgSeq: number }): Promise<{ items: Array<unknown> }>;
 
     fetchGroupEssenceList(req: {
         groupCode: string,