diff --git a/plotnine/scales/_expand.py b/plotnine/scales/_expand.py
index c62ad602c..fcf0ec110 100644
--- a/plotnine/scales/_expand.py
+++ b/plotnine/scales/_expand.py
@@ -32,7 +32,7 @@ def _expand_range_distinct(
 def expand_range(
     x: CoordRange,
     expand: tuple[float, float] | tuple[float, float, float, float],
-    trans: trans | Type[trans],
+    trans: trans,
 ) -> range_view:
     """
     Expand Coordinate Range in coordinate space
diff --git a/plotnine/scales/scale.py b/plotnine/scales/scale.py
index c6316cedb..ce2cb4358 100644
--- a/plotnine/scales/scale.py
+++ b/plotnine/scales/scale.py
@@ -3,7 +3,6 @@
 from abc import ABC
 from copy import copy, deepcopy
 from dataclasses import dataclass, field
-from functools import cached_property
 from typing import TYPE_CHECKING, Generic, cast
 
 import numpy as np
diff --git a/plotnine/scales/scale_continuous.py b/plotnine/scales/scale_continuous.py
index d85060082..ae873c1e0 100644
--- a/plotnine/scales/scale_continuous.py
+++ b/plotnine/scales/scale_continuous.py
@@ -2,7 +2,6 @@
 
 from contextlib import suppress
 from dataclasses import dataclass
-from functools import cached_property
 from typing import TYPE_CHECKING, Sequence
 from warnings import warn
 
@@ -507,7 +506,7 @@ def get_labels(
         if self.labels is False or self.labels is None:
             labels = []
         elif self.labels is True:
-            labels = self._trans.format(breaks)  # type: ignore
+            labels = self._trans.format(breaks)
         elif callable(self.labels):
             labels = self.labels(breaks)
         elif isinstance(self.labels, dict):
diff --git a/plotnine/scales/scale_datetime.py b/plotnine/scales/scale_datetime.py
index d40f98583..958bd485b 100644
--- a/plotnine/scales/scale_datetime.py
+++ b/plotnine/scales/scale_datetime.py
@@ -1,21 +1,10 @@
 from __future__ import annotations
 
 from dataclasses import KW_ONLY, InitVar, dataclass
-from datetime import timedelta
-from typing import TYPE_CHECKING, overload
-
-import numpy as np
 
 from ._runtime_typing import TransUser  # noqa: TCH001
 from .scale_continuous import scale_continuous
 
-if TYPE_CHECKING:
-    from typing import Sequence
-
-    import pandas as pd
-
-    from plotnine.typing import FloatArray
-
 
 @dataclass
 class scale_datetime(scale_continuous):
diff --git a/pyproject.toml b/pyproject.toml
index 0e0c41c4a..568317bb9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,7 +24,7 @@ classifiers = [
 dependencies = [
     "matplotlib>=3.8.0",
     "pandas>=2.2.0",
-    "mizani~=0.12.2",
+    "mizani~=0.13.0",
     "numpy>=1.23.5",
     "scipy>=1.8.0",
     "statsmodels>=0.14.0",