diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 44bbcb9..c01047e 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -23,7 +23,7 @@ jobs:
         strategy:
             fail-fast: false
             matrix:
-                python-version: ["3.8", "3.9", "3.10", "3.11"]
+                python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
         steps:
         - uses: actions/checkout@v3
         - name: Set up Python ${{ matrix.python-version }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
index fe0853f..ec53c18 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,8 @@
 All notable changes to this project will be documented here.
 
 ## [Unreleased]
+### Added
+- Official support for Python 3.12 and `numpy` 1.26.
 
 ## [1.0.1] - 2023-07-23
 ### Changed
diff --git a/pyproject.toml b/pyproject.toml
index 3b45224..72c12b6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -37,6 +37,7 @@ classifiers = [
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Topic :: Scientific/Engineering",
 ]
 
diff --git a/tox.ini b/tox.ini
index 5ea44d9..ae1e5bd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = global-init,py38-numpy1.{17,19,21,22,23,24},py39-numpy1.{17,19,21,22,23,24,25},py310-numpy1.{21,22,23,24,25},py311-numpy1.{23,24,25},global-finalize
+envlist = global-init,py38-numpy1.{17,19,21,22,23,24},py39-numpy1.{17,19,21,22,23,24,25},py310-numpy1.{21,22,23,24,25},py311-numpy1.{23,24,25},py312-numpy1.26,global-finalize
 
 [gh-actions]
 python =
@@ -7,6 +7,7 @@ python =
     3.9: py39
     3.10: py310
     3.11: py311
+    3.12: py312
 
 [testenv:global-init]
 skip_install = True
@@ -27,6 +28,7 @@ deps =
     numpy1.23: numpy>=1.23,<1.24
     numpy1.24: numpy>=1.24,<1.25
     numpy1.25: numpy>=1.25,<1.26
+    numpy1.26: numpy>=1.26,<1.27
 setenv =
     COVERAGE_FILE = {toxworkdir}/.coverage.{envname}
 commands = py.test test -v --cov=plyfile