diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3e8cbad..90a41cd 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,25 +14,49 @@ jobs:
 
   build:
     name: Python==${{ matrix.python-version }} | ${{ matrix.django-version }}
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-24.04
 
     strategy:
       fail-fast: false
       matrix:
         python-version:
-          - "3.8"
           - "3.9"
           - "3.10"
+          - "3.11"
+          - "3.12"
+          - "3.13"
         django-version:
-          - django~=3.2.0
-          - django~=4.1.0
           - django~=4.2.0
+          - django~=5.1.0
+          - django~=5.2.0
+        exclude:
+          # Django 5.1+ requires Python >=3.10
+          - python-version: "3.9"
+            django-version: django~=5.1.0
+          - python-version: "3.9"
+            django-version: django~=5.2.0
+          # Python 3.13 supported only in Django >=5.1.3
+          - python-version: "3.13"
+            django-version: django~=4.2.0
 
     steps:
     - uses: actions/checkout@v4
       with:
         ref: ${{ github.event.pull_request.head.sha }}
 
+    - name: Cache APT packages
+      uses: actions/cache@v4
+      with:
+        path: /var/cache/apt/archives
+        key: apt-${{ runner.os }}-${{ hashFiles('.github/workflows/ci.yml') }}
+        restore-keys: |
+          apt-${{ runner.os }}-
+
+    - name: Disable man page auto-update
+      run: |
+        echo 'set man-db/auto-update false' | sudo debconf-communicate >/dev/null
+        sudo dpkg-reconfigure man-db
+
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v5
       with:
diff --git a/README.rst b/README.rst
index ebb1c20..0a1a422 100755
--- a/README.rst
+++ b/README.rst
@@ -46,7 +46,7 @@ manipulate a flat JSON object made of simple keys and values**.
 Compatibility
 -------------
 
-Tested on python >= 3.8 and Django 3.2, 4.1 and 4.2.
+Tested on python >= 3.9 and Django 4.2, 5.1 and 5.2.
 
 It should work also on previous versions of Django.
 
diff --git a/setup.py b/setup.py
index 8d32b56..77a0bbe 100644
--- a/setup.py
+++ b/setup.py
@@ -18,7 +18,10 @@
     packages=find_packages(exclude=['tests*', 'docs*']),
     include_package_data=True,
     zip_safe=False,
-    install_requires=[],
+    python_requires='>=3.9',
+    install_requires=[
+        'django>=4.2,<5.3',
+    ],
     extras_require={
         'test': [
             (
@@ -36,6 +39,14 @@
         'License :: OSI Approved :: BSD License',
         'Operating System :: OS Independent',
         'Framework :: Django',
+        'Framework :: Django :: 4.2',
+        'Framework :: Django :: 5.1',
+        'Framework :: Django :: 5.2',
         'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
+        'Programming Language :: Python :: 3.12',
+        'Programming Language :: Python :: 3.13',
     ],
 )