diff --git a/src/background/service/keyring/index.ts b/src/background/service/keyring/index.ts
index b46674ebcef..d2f1d01bc0a 100644
--- a/src/background/service/keyring/index.ts
+++ b/src/background/service/keyring/index.ts
@@ -93,7 +93,7 @@ export class KeyringService extends EventEmitter {
   store!: ObservableStore<any>;
   memStore: ObservableStore<MemStoreState>;
   keyrings: any[];
-  password: string | null = null;
+  private password: string | null = null;
 
   constructor() {
     super();