diff --git a/.github/workflows/tox.yaml b/.github/workflows/tox.yaml
index 2cf3db71..3a9c211b 100644
--- a/.github/workflows/tox.yaml
+++ b/.github/workflows/tox.yaml
@@ -31,19 +31,19 @@ jobs:
       fail-fast: false
       matrix:
         os:
-          - ubuntu-20.04
+          - ubuntu-22.04
         py:
-          - "3.8"
           - "3.9"
           - "3.10"
           - "3.11"
+          - "3.12"
     steps:
       - name: Set up Python ${{ matrix.py }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.py }}
       - name: Checkout scos-actions
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Install tox-gh
         run: python -m pip install tox-gh
       - name: Set up test suite
diff --git a/README.md b/README.md
index 37b521c1..64fd2265 100644
--- a/README.md
+++ b/README.md
@@ -102,7 +102,7 @@ if the new functionality can be supported by most signal analyzers.
 ### Requirements and Configuration
 
 Set up a development environment using a tool like [Conda](https://docs.conda.io/en/latest/)
-or [venv](https://docs.python.org/3/library/venv.html#module-venv), with `python>=3.8`. Then,
+or [venv](https://docs.python.org/3/library/venv.html#module-venv), with `python>=3.9`. Then,
 from the cloned directory, install the development dependencies by running:
 
 ```bash
diff --git a/pyproject.toml b/pyproject.toml
index 61ee7e34..6e69ef93 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ name = "scos-actions"
 dynamic = ["version"]
 description = "The base plugin providing common actions and interfaces for SCOS Sensor plugins"
 readme = "README.md"
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 license = { file = "LICENSE.md" }
 
 authors = [
@@ -35,32 +35,32 @@ classifiers = [
     "Environment :: Plugins",
     "Programming Language :: Python",
     "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",
 ]
 
 dependencies = [
     "environs>=9.5.0",
-    "django>=4.2,<5.0",
+    "django>=4.2.8,<5.0",  # As of 4.2.8, Python 3.13 is not supported.
     "its_preselector @ git+https://github.com/NTIA/Preselector@3.1.0",
     "msgspec>=0.16.0,<1.0.0",
     "numexpr>=2.8.3",
-    "numpy>=1.22.0",
+    "numpy>=1.25.0",
     "psutil>=5.9.4",
     "python-dateutil>=2.0",
     "ray>=2.10.0",
     "ruamel.yaml>=0.15",
-    "scipy>=1.8.0",
+    "scipy>=1.11.4",
     "sigmf @ git+https://github.com/NTIA/SigMF@multi-recording-archive",
 ]
 
 [project.optional-dependencies]
 test = [
-    "pytest>=7.3.1,<8.0",
-    "pytest-cov>=4.0.0,<5.0",
-    "tox>=4.5.1,<5.0",
+    "pytest>=8.0,<9.0",
+    "pytest-cov>=6.0,<7.0",
+    "tox>=4.5.1,<5.0",  # Keep in sync with min_version in tox.ini
 ]
 dev = [
     "hatchling>=1.14.1,<2.0",
diff --git a/tox.ini b/tox.ini
index f04c3a61..de57049f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,9 +1,9 @@
 [tox]
 env_list =
-    py38
     py39
     py310
     py311
+    py312
 min_version = 4.5.1
 skip_missing_interpreters = true
 no_package = false
@@ -17,7 +17,7 @@ commands = pytest --cov-report term-missing --no-cov-on-fail --cov {posargs}
 
 [gh]  ; GitHub Actions CI with tox-gh
 python =
-    3.8 = py38
     3.9 = py39
     3.10 = py310
     3.11 = py311
+    3.12 = py312