diff --git a/src/core/apis/file.ts b/src/core/apis/file.ts
index e955603b..cd54d905 100644
--- a/src/core/apis/file.ts
+++ b/src/core/apis/file.ts
@@ -41,7 +41,7 @@ export class NTQQFileApi {
     }
 
     async getFileSize(filePath: string): Promise<number> {
-        return await this.context.wrapper.util.getFileSize(filePath);
+        return await this.core.util.getFileSize(filePath);
     }
 
     async getVideoUrl(peer: Peer, msgId: string, elementId: string) {
diff --git a/src/core/apis/system.ts b/src/core/apis/system.ts
index 5bf3123e..4b23a7dc 100644
--- a/src/core/apis/system.ts
+++ b/src/core/apis/system.ts
@@ -10,7 +10,7 @@ export class NTQQSystemApi {
     }
 
     async hasOtherRunningQQProcess() {
-        return this.context.wrapper.util.hasOtherRunningQQProcess();
+        return this.core.util.hasOtherRunningQQProcess();
     }
 
     async ORCImage(filePath: string) {