diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 734724d..71b3228 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,12 +13,10 @@ jobs:
       matrix:
         codebase: ['Prod', 'Dev']
         django-version: ['4.2', '5.0', 'dev']
-        python-version: ['3.11', '3.12']
+        python-version: ['3.12']
         exclude:
           - codebase: 'Prod'
             django-version: 'dev'
-          - python-version: '3.11'
-            django-version: 'dev'
 
     services:
       mysql:
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 3d0fdbe..df05b16 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -13,7 +13,7 @@ repos:
     rev: 24.4.2
     hooks:
       - id: black
-        language_version: python3.11
+        language_version: python3.12
 
   - repo: https://github.com/pycqa/flake8
     rev: 7.0.0
diff --git a/CHANGES b/CHANGES
index 80ed034..e420bc5 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,6 +1,10 @@
 Changes
 +++++++
 
+unreleased
+------
+- drop Python 3.11 support
+
 0.1.54
 ------
 - update Subject Screening to extend window for serum CrAg to be
diff --git a/README.rst b/README.rst
index 32491ce..8600812 100644
--- a/README.rst
+++ b/README.rst
@@ -35,7 +35,7 @@ Create a virtualenv, clone the main repo and checkout master
 
 .. code-block:: bash
 
-  conda create -n edc python=3.11
+  conda create -n edc python=3.12
   conda activate edc
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 7a10596..bce6f28 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,12 +6,12 @@ version_file="_version.py"
 
 [tool.black]
 line-length = 95
-target-version = ["py311"]
+target-version = ["py312"]
 extend-exclude = '''^(.*\/)*\b(migrations)\b($|\/.*$)'''
 
 [tool.isort]
 profile = "black"
-py_version = "311"
+py_version = "312"
 skip = [".tox", ".eggs", "migrations"]
 
 [tool.coverage.run]
@@ -35,7 +35,7 @@ exclude_lines = [
 legacy_tox_ini = """
 [tox]
 envlist =
-    py{311,312}-dj{42,50}-edc{prod,dev},
+    py{312}-dj{42,50}-edc{prod,dev},
     py{312}-dj{dev}-edc{dev},
     lint
 
@@ -43,8 +43,7 @@ isolated_build = true
 
 [gh-actions]
 python =
-    3.11: py311, lint
-    3.12: py312
+    3.12: py312, lint
 
 [gh-actions:env]
 DJANGO =
diff --git a/setup.cfg b/setup.cfg
index 1897bd4..3c74b36 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -16,12 +16,12 @@ classifiers=
     Intended Audience :: Developers
     Intended Audience :: Science/Research
     Operating System :: OS Independent
-    Programming Language :: Python :: 3.11
+    Programming Language :: Python :: 3.12
     License :: OSI Approved :: GNU General Public License v3 (GPLv3)
 
 
 [options]
-python_requires = >=3.11
+python_requires = >=3.12
 zip_safe = False
 include_package_data = True
 packages = find: