diff --git a/.github/workflows/pr.yml b/.github/workflows/pr.yml
index 47708447..08fd352e 100644
--- a/.github/workflows/pr.yml
+++ b/.github/workflows/pr.yml
@@ -82,7 +82,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v3
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 2a8491e5..25ce048e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -10,10 +10,10 @@ jobs:
     name: ${{ matrix.platform }} py${{ matrix.python-version }}
     runs-on: ${{ matrix.platform }}
     strategy:
+      max-parallel: 3
       matrix:
         platform: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.9", "3.10", "3.11"]
-
+        python-version: ["3.10", "3.11", "3.12"]
     steps:
       - uses: actions/checkout@v3
 
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d773e74e..4c1f7c77 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -25,7 +25,7 @@ repos:
     rev: 6.0.0
     hooks:
       - id: flake8
-        args: [--ignore, "E203,W503", --min-python-version, '3.9']
+        args: [--ignore, "E203,W503", --min-python-version, '3.10']
         additional_dependencies: [flake8-typing-imports==1.12.0]
   - repo: https://github.com/psf/black
     rev: 23.3.0
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 3d5039ae..f3c20cea 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -76,7 +76,7 @@ and Python with an environment management tool
 If you use Conda, set up an environment with:
 
 ```sh
-conda create -n iohub-dev python=3.9
+conda create -n iohub-dev python=3.10
 conda activate iohub-dev
 ```
 
diff --git a/setup.cfg b/setup.cfg
index 2c860a79..9f31d092 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -12,9 +12,9 @@ classifiers =
     Intended Audience :: Science/Research
     License :: OSI Approved :: BSD License
     Programming Language :: Python :: 3 :: Only
-	Programming Language :: Python :: 3.9
 	Programming Language :: Python :: 3.10
 	Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
     Topic :: Scientific/Engineering
     Topic :: Scientific/Engineering :: Image Processing
     Operating System :: Microsoft :: Windows
@@ -29,7 +29,7 @@ project_urls =
 [options]
 package = find:
 include_package_data = True
-python_requires = >=3.9
+python_requires = >=3.10
 setup_requires = setuptools_scm
 install_requires =
     pandas>=1.5.2