diff --git a/.github/workflows/coverage_report.yml b/.github/workflows/coverage_report.yml
index 4ac0052..07aec97 100644
--- a/.github/workflows/coverage_report.yml
+++ b/.github/workflows/coverage_report.yml
@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.8]
+        python-version: [3.9]
 
     steps:
     - uses: actions/checkout@v3
diff --git a/.github/workflows/python_tests.yml b/.github/workflows/python_tests.yml
index b442856..c1fe859 100644
--- a/.github/workflows/python_tests.yml
+++ b/.github/workflows/python_tests.yml
@@ -9,7 +9,7 @@ jobs:
     strategy:
       matrix:
         os: [macos-latest, ubuntu-latest, windows-latest]
-        python-version: ['3.8', '3.11']
+        python-version: ['3.9', '3.12']
 
     steps:
     - uses: actions/checkout@v3
diff --git a/.github/workflows/release_pip.yml b/.github/workflows/release_pip.yml
index b89656a..168e709 100644
--- a/.github/workflows/release_pip.yml
+++ b/.github/workflows/release_pip.yml
@@ -14,7 +14,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v4
       with:
-        python-version: '3.8'
+        python-version: '3.9'
 
     - name: Install dependencies
       run: |
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 470ec68..f879256 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -9,7 +9,7 @@ version: 2
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.8"
+    python: "3.9"
   apt_packages:
     - graphviz
 
diff --git a/docs/source/installation.rst b/docs/source/installation.rst
index 4996338..d7fc639 100644
--- a/docs/source/installation.rst
+++ b/docs/source/installation.rst
@@ -1,7 +1,7 @@
 Installation
 ############
 
-This `py-droplets` package is developed for python 3.8+ and should run on all
+This `py-droplets` package is developed for python 3.9+ and should run on all
 common platforms.
 The code is tested under Linux, Windows, and macOS.
 
@@ -37,11 +37,11 @@ The required packages are listed in the table below:
 ===========  ========= =========
 Package      Version   Usage 
 ===========  ========= =========
-matplotlib   >=3.1.0   Visualizing results
+matplotlib   >=3.1     Visualizing results
 numpy        >=1.22    Array library used for storing data
-numba        >=0.48    Just-in-time compilation to accelerate numerics
+numba        >=0.59    Just-in-time compilation to accelerate numerics
 scipy        >=1.4     Miscellaneous scientific functions
-py-pde       >=0.35    Simulating partial differential equations
+py-pde       >=0.37    Simulating partial differential equations
 ===========  ========= =========
 
 These package can be installed via your operating system's package manager, e.g.
diff --git a/droplets/droplets.py b/droplets/droplets.py
index 277446f..4edc126 100644
--- a/droplets/droplets.py
+++ b/droplets/droplets.py
@@ -32,7 +32,7 @@
 import warnings
 from abc import ABCMeta, abstractmethod
 from pathlib import Path
-from typing import Any, Callable, List, Tuple, Type, TypeVar, Union
+from typing import Any, Callable, TypeVar, Union
 
 import numpy as np
 from numba.extending import register_jitable
@@ -49,7 +49,7 @@
 from .tools import spherical
 
 TDroplet = TypeVar("TDroplet", bound="DropletBase")
-DTypeList = List[Union[Tuple[str, Type[Any]], Tuple[str, Type[Any], Tuple[int, ...]]]]
+DTypeList = list[Union[tuple[str, type[Any]], tuple[str, type[Any], tuple[int, ...]]]]
 
 
 def get_dtype_field_size(dtype: DTypeLike, field_name: str) -> int:
diff --git a/droplets/emulsions.py b/droplets/emulsions.py
index c3540e4..ee71f3e 100644
--- a/droplets/emulsions.py
+++ b/droplets/emulsions.py
@@ -17,16 +17,8 @@
 import logging
 import math
 import warnings
-from typing import (
-    TYPE_CHECKING,
-    Any,
-    Callable,
-    Iterable,
-    Iterator,
-    Literal,
-    Sequence,
-    overload,
-)
+from collections.abc import Iterable, Iterator, Sequence
+from typing import TYPE_CHECKING, Any, Callable, Literal, overload
 
 import numpy as np
 
diff --git a/droplets/image_analysis.py b/droplets/image_analysis.py
index add8fe9..82e7911 100644
--- a/droplets/image_analysis.py
+++ b/droplets/image_analysis.py
@@ -20,9 +20,10 @@
 import logging
 import math
 import warnings
+from collections.abc import Iterable, Sequence
 from functools import reduce
 from itertools import product
-from typing import Any, Callable, Iterable, Literal, Sequence
+from typing import Any, Callable, Literal
 
 import numpy as np
 from numpy.lib.recfunctions import (
diff --git a/pyproject.toml b/pyproject.toml
index f32ffb0..c0695e3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ authors = [
 ]
 license = {text = "MIT"}
 readme = "README.md"
-requires-python = ">=3.8,<3.12"
+requires-python = ">=3.9,<3.13"
 dynamic = ["version"]
 
 keywords = ["emulsions", "image-analysis"]
@@ -17,20 +17,20 @@ classifiers = [
     "Topic :: Scientific/Engineering",
     "License :: OSI Approved :: MIT License",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
 ]
 
 # Requirements for setuptools
 dependencies = [
-    "matplotlib>=3.1.0",
-    "numba>=0.56.0",
-    "numpy>=1.22.0",
-    "scipy>=1.4.0",
-    "sympy>=1.5.0",
-    "py-pde>=0.35",
+    "matplotlib>=3.1",
+    "numba>=0.59",
+    "numpy>=1.22",
+    "scipy>=1.4",
+    "sympy>=1.5",
+    "py-pde>=0.37",
 ]
 
 [project.optional-dependencies]
@@ -64,7 +64,7 @@ namespaces = false
 write_to = "droplets/_version.py"
 
 [tool.black]
-target_version = ["py38"]
+target_version = ["py39"]
 
 [tool.isort]
 profile = "black"
@@ -85,7 +85,7 @@ filterwarnings = [
 omit = ['*/test*']
 
 [tool.mypy]
-python_version = "3.8"
+python_version = "3.9"
 plugins = "numpy.typing.mypy_plugin"
 warn_return_any = true
 warn_unused_configs = true
diff --git a/scripts/format_code.sh b/scripts/format_code.sh
index 2d8651a..2366dc0 100755
--- a/scripts/format_code.sh
+++ b/scripts/format_code.sh
@@ -3,7 +3,7 @@
 
 echo "Upgrading python syntax..."
 pushd .. > /dev/null
-find . -name '*.py' -exec pyupgrade --py38-plus {} +
+find . -name '*.py' -exec pyupgrade --py39-plus {} +
 popd > /dev/null
 
 echo "Formating import statements..."
diff --git a/scripts/run_tests.py b/scripts/run_tests.py
index cf0756d..e555393 100755
--- a/scripts/run_tests.py
+++ b/scripts/run_tests.py
@@ -4,8 +4,8 @@
 import os
 import subprocess as sp
 import sys
+from collections.abc import Sequence
 from pathlib import Path
-from typing import Sequence
 
 PACKAGE = "droplets"  # name of the package that needs to be tested
 PACKAGE_PATH = Path(__file__).resolve().parents[1]  # base path of the package
diff --git a/tests/test_examples.py b/tests/test_examples.py
index 11c83c0..908c38b 100644
--- a/tests/test_examples.py
+++ b/tests/test_examples.py
@@ -15,7 +15,7 @@
 PACKAGE_PATH = Path(__file__).resolve().parents[1]
 EXAMPLES = (PACKAGE_PATH / "examples").glob("*.py")
 
-SKIP_EXAMPLES: List[str] = []
+SKIP_EXAMPLES: list[str] = []
 if not module_available("matplotlib"):
     SKIP_EXAMPLES.append("plot_emulsion.py")
 
diff --git a/tests/test_spherical.py b/tests/test_spherical.py
index c1d6ae4..310593e 100644
--- a/tests/test_spherical.py
+++ b/tests/test_spherical.py
@@ -134,7 +134,7 @@ def test_polar_coordinates_1d():
     """test polar_coordinates function in 1d"""
     grid = pde.UnitGrid([2])
     p1, a1 = spherical.polar_coordinates(grid, ret_angle=True)
-    p2 = grid.point_from_cartesian(grid.cell_coords, full=True)
+    p2 = grid.c.pos_from_cart(grid.cell_coords)
     np.testing.assert_allclose(a1, 1)
     np.testing.assert_allclose(p1[:, np.newaxis], p2)
 
@@ -144,7 +144,7 @@ def test_polar_coordinates_2d():
     grid = pde.UnitGrid([2, 2])
     grid_sph = pde.PolarSymGrid(5, 1)
     p1 = spherical.polar_coordinates(grid, ret_angle=True)
-    p2 = grid_sph.point_from_cartesian(grid.cell_coords, full=True)
+    p2 = grid_sph.c.pos_from_cart(grid.cell_coords)
     np.testing.assert_allclose(np.moveaxis(p1, 0, -1), p2)
 
 
@@ -156,5 +156,5 @@ def test_polar_coordinates_3d():
     np.testing.assert_allclose(np.moveaxis(p1, 0, -1), p2)
 
     grid_sph = pde.SphericalSymGrid(5, 1)
-    p3 = grid_sph.point_from_cartesian(grid.cell_coords, full=True)
+    p3 = grid_sph.c.pos_from_cart(grid.cell_coords)
     np.testing.assert_allclose(np.moveaxis(p1, 0, -1), p3)