diff --git a/src/client/TonClient.ts b/src/client/TonClient.ts
index 4ebd3f9..c719860 100644
--- a/src/client/TonClient.ts
+++ b/src/client/TonClient.ts
@@ -36,7 +36,7 @@ export type TonClientParameters = {
 export class TonClient {
     readonly parameters: TonClientParameters;
 
-    private readonly api: HttpApi;
+    protected api: HttpApi;
 
     constructor(parameters: TonClientParameters) {
         this.parameters = {
@@ -483,4 +483,4 @@ function createProvider(client: TonClient, address: Address, init: { code: Cell
             });
         }
     }
-}
\ No newline at end of file
+}