diff --git a/src/api/Security.ts b/src/api/Security.ts
index 2058619..2dc019f 100644
--- a/src/api/Security.ts
+++ b/src/api/Security.ts
@@ -7,7 +7,7 @@ import { AccountInterface } from '../models';
 export default class Security {
   public client: Client;
 
-  private keyBase: { key: string, iv: string };
+  protected readonly keyBase: { key: string, iv: string };
 
   constructor(client: Client) {
     this.client = client;