diff --git a/ton-http-api/pyTON/manager.py b/ton-http-api/pyTON/manager.py
index 79fe428..8689c56 100644
--- a/ton-http-api/pyTON/manager.py
+++ b/ton-http-api/pyTON/manager.py
@@ -14,6 +14,8 @@
 from pyTON.cache import CacheManager, DisabledCacheManager
 from pyTON.settings import TonlibSettings
 
+from pytonlib import TonlibError
+
 from typing import Optional, Dict, Any
 from dataclasses import dataclass
 from datetime import datetime