diff --git a/sphinx_thrift/thrift_ast.py b/sphinx_thrift/thrift_ast.py
index a2d0cc1..70028ff 100644
--- a/sphinx_thrift/thrift_ast.py
+++ b/sphinx_thrift/thrift_ast.py
@@ -1,8 +1,6 @@
 from dataclasses import dataclass
 from typing import Any, Dict, List, Optional, Union
 
-import attr
-
 AtomicType = str
 Type = Union[AtomicType, 'ListType', 'SetType', 'MapType', 'ReferenceType']