diff --git a/.flake8 b/.flake8
index 89d7103..48f63f2 100644
--- a/.flake8
+++ b/.flake8
@@ -3,4 +3,4 @@ max-complexity=11
 max-line-length=127
 ignore=E266 # for code sections as comments
     E203, W503 # black compatibility
-exclude=trontxsize/tron_pb2.py
+exclude=build,trontxsize/tron_pb2.py