diff --git a/s_expression_parser/parser.py b/s_expression_parser/parser.py
index cf318cc..e1ed298 100644
--- a/s_expression_parser/parser.py
+++ b/s_expression_parser/parser.py
@@ -1,4 +1,5 @@
 from typing import Union
+
 import attr
 
 from .lexer import PARENS, lex