diff --git a/django-stubs/forms/models.pyi b/django-stubs/forms/models.pyi
index 1cb275f..2e471de 100644
--- a/django-stubs/forms/models.pyi
+++ b/django-stubs/forms/models.pyi
@@ -2,6 +2,7 @@ from datetime import datetime
 from typing import (
     Any,
     Callable,
+    Collection,
     Dict,
     Iterator,
     List,
@@ -36,7 +37,7 @@ from django.db.models import ForeignKey
 
 ALL_FIELDS: str
 
-_Fields = Union[List[Union[Callable, str]], Sequence[str], Literal["__all__"]]
+_Fields = Union[Collection[str], Literal["__all__"]]
 _Labels = Dict[str, str]
 _ErrorMessages = Dict[str, Dict[str, str]]
 
diff --git a/setup.py b/setup.py
index 63b28bd..6381f70 100644
--- a/setup.py
+++ b/setup.py
@@ -21,7 +21,7 @@ with open("README.md") as f:
     readme = f.read()
 
 dependencies = [
-    "mypy>=0.790",
+    "mypy>=0.900",
     "typing-extensions",
     "django",
     "django-stubs-ext",