diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b10bf99f..d7084262 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,7 +14,7 @@ jobs:
       matrix:
         python_version: ['3.12']
         ubuntu_version: ['22.04', '24.04']
-        tox_env: [ "django42", "django52"]
+        tox_env: [ "django52"]
         include:
           - tox_env: quality
             ubuntu_version: '24.04'
diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index bc5fd2d9..12a9af88 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -14,7 +14,7 @@ Changelog
 Unreleased
 **********
 
-*
+* Dropped Django 4.2 from CI test matrix; bumped numpy, tox, virtualenv
 
 4.1.0 - 2025-11-04
 ******************
diff --git a/requirements/pip_tools.txt b/requirements/pip_tools.txt
index 28772075..d080ab1d 100644
--- a/requirements/pip_tools.txt
+++ b/requirements/pip_tools.txt
@@ -13,4 +13,4 @@ wheel==0.46.3             # via pip-tools
 
 # The following packages are considered to be unsafe in a requirements file:
 pip==26.0.1               # via pip-tools
-setuptools==82.0.0        # via pip-tools
+setuptools==82.0.1        # via pip-tools
diff --git a/requirements/sandbox.txt b/requirements/sandbox.txt
index e7f935ff..c98cd453 100644
--- a/requirements/sandbox.txt
+++ b/requirements/sandbox.txt
@@ -4,5 +4,5 @@
 #
 #    make upgrade
 #
-numpy==2.4.2              # via -r requirements/sandbox.in
+numpy==2.4.3              # via -r requirements/sandbox.in
 six==1.17.0               # via -r requirements/sandbox.in
diff --git a/requirements/testing.txt b/requirements/testing.txt
index 0a3cf238..c30b7363 100644
--- a/requirements/testing.txt
+++ b/requirements/testing.txt
@@ -7,6 +7,7 @@
 asgiref==3.11.1           # via django
 astroid==4.0.4            # via pylint
 dill==0.4.1               # via pylint
+django==5.2.12            # via -c requirements/common_constraints.txt, -r requirements/testing.in
 iniconfig==2.3.0          # via pytest
 isort==8.0.1              # via -r requirements/testing.in, pylint
 mccabe==0.7.0             # via pylint
diff --git a/requirements/tox.txt b/requirements/tox.txt
index a165b124..adf2da8b 100644
--- a/requirements/tox.txt
+++ b/requirements/tox.txt
@@ -1,18 +1,18 @@
 #
-# This file is autogenerated by pip-compile with Python 3.11
+# This file is autogenerated by pip-compile with Python 3.12
 # by the following command:
 #
 #    make upgrade
 #
-cachetools==7.0.4         # via tox
+cachetools==7.0.5         # via tox
 colorama==0.4.6           # via tox
 distlib==0.4.0            # via virtualenv
-filelock==3.25.0          # via python-discovery, tox, virtualenv
+filelock==3.25.2          # via python-discovery, tox, virtualenv
 packaging==26.0           # via pyproject-api, tox
 platformdirs==4.9.4       # via python-discovery, tox, virtualenv
 pluggy==1.6.0             # via tox
 pyproject-api==1.10.0     # via tox
-python-discovery==1.1.1   # via virtualenv
+python-discovery==1.2.0   # via virtualenv
 tomli-w==1.2.0            # via tox
-tox==4.49.0               # via -r requirements/tox.in
-virtualenv==21.1.0        # via tox
+tox==4.50.3               # via -r requirements/tox.in
+virtualenv==21.2.0        # via tox
diff --git a/tox.ini b/tox.ini
index f4061b81..ad026d2a 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = django{42,52},quality
+envlist = django52,quality
 
 [testenv]
 passenv =
@@ -9,7 +9,6 @@ allowlist_externals =
     make
     mkdir
 deps =
- 	django42: Django~=4.2
  	django52: Django~=5.2
     -rrequirements/testing.txt
     -rrequirements/sandbox.txt