diff --git a/msgpack/ext.py b/msgpack/ext.py
index 451a08d..7ee9cff 100644
--- a/msgpack/ext.py
+++ b/msgpack/ext.py
@@ -1,7 +1,7 @@
 import datetime
 import struct
-from collections import namedtuple
 import typing as t
+from collections import namedtuple
 
 
 class ExtType(namedtuple("ExtType", "code data")):
diff --git a/msgpack/fallback.py b/msgpack/fallback.py
index 146c9b6..023c1e5 100644
--- a/msgpack/fallback.py
+++ b/msgpack/fallback.py
@@ -2,10 +2,10 @@
 
 import struct
 import sys
-from datetime import datetime as _DateTime
-import typing as t
 import types
+import typing as t
 from collections.abc import Sequence
+from datetime import datetime as _DateTime
 
 _ClassInfo: t.TypeAlias = type | types.UnionType | tuple['_ClassInfo', ...]
 _Pair = tuple[t.Any, t.Any]