diff --git a/aiotx/clients/_base_client.py b/aiotx/clients/_base_client.py
index 67742f9..1696d83 100644
--- a/aiotx/clients/_base_client.py
+++ b/aiotx/clients/_base_client.py
@@ -6,7 +6,7 @@
 
 import aiohttp
 
-from aiotx.exceptions import RpcConnectionError, BlockNotFoundError
+from aiotx.exceptions import BlockNotFoundError, RpcConnectionError
 from aiotx.log import logger