diff --git a/src/tryceratops/fixers/base.py b/src/tryceratops/fixers/base.py
index 7732574..49a0bd0 100644
--- a/src/tryceratops/fixers/base.py
+++ b/src/tryceratops/fixers/base.py
@@ -1,6 +1,6 @@
 from abc import ABC, abstractmethod
 from collections import defaultdict
-from typing import Generic, Iterable, List, TypeVar
+from typing import Dict, Generic, Iterable, List, TypeVar
 
 from tryceratops.processors import Processor
 from tryceratops.violations import Violation
@@ -8,7 +8,7 @@
 from .exceptions import FixerFixException
 
 ViolationType = TypeVar("ViolationType", bound=Violation)
-GroupedViolations = dict[str, List[ViolationType]]
+GroupedViolations = Dict[str, List[ViolationType]]
 
 
 class FileFixerHandler: