diff --git a/.github/workflows/pytest-builds.yml b/.github/workflows/pytest-builds.yml
index a36e55c..c2d8d06 100644
--- a/.github/workflows/pytest-builds.yml
+++ b/.github/workflows/pytest-builds.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
         arch: ['x64', 'x86']
 
     steps:
@@ -50,7 +50,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
 
     steps:
     - uses: actions/checkout@v6
@@ -86,7 +86,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.10', '3.11', '3.12', '3.13', '3.14']
 
     steps:
     - uses: actions/checkout@v6
@@ -117,7 +117,7 @@ jobs:
         pytest --cov=libjpeg --cov-append libjpeg/tests
 
     - name: Switch to pydicom dev and rerun pytest
-      if: ${{ contains('3.10 3.11 3.12 3.13', matrix.python-version) }}
+      if: ${{ contains('3.10 3.11 3.12 3.13 3.14', matrix.python-version) }}
       run: |
         pip uninstall -y pydicom
         pip install git+https://github.com/pydicom/pydicom
diff --git a/.github/workflows/release-wheels.yml b/.github/workflows/release-wheels.yml
index d35852b..a41698d 100644
--- a/.github/workflows/release-wheels.yml
+++ b/.github/workflows/release-wheels.yml
@@ -20,7 +20,7 @@ jobs:
     - uses: actions/setup-python@v6
       name: Install Python
       with:
-        python-version: '3.10'
+        python-version: '3.11'
 
     - name: Build sdist
       run: |
@@ -29,7 +29,7 @@ jobs:
         poetry build -f sdist
 
     - name: Store artifacts
-      uses: actions/upload-artifact@v6
+      uses: actions/upload-artifact@v7
       with:
         name: sdist
         path: ./dist
@@ -42,9 +42,6 @@ jobs:
       matrix:
         include:
           # Windows 32 bit
-          - os: windows-latest
-            python: 39
-            platform_id: win32
           - os: windows-latest
             python: 310
             platform_id: win32
@@ -57,11 +54,11 @@ jobs:
           - os: windows-latest
             python: 313
             platform_id: win32
+          - os: windows-latest
+            python: 314
+            platform_id: win32
 
           # Windows 64 bit
-          - os: windows-latest
-            python: 39
-            platform_id: win_amd64
           - os: windows-latest
             python: 310
             platform_id: win_amd64
@@ -74,12 +71,11 @@ jobs:
           - os: windows-latest
             python: 313
             platform_id: win_amd64
+          - os: windows-latest
+            python: 314
+            platform_id: win_amd64
 
           # Linux 64 bit manylinux2014
-          - os: ubuntu-latest
-            python: 39
-            platform_id: manylinux_x86_64
-            manylinux_image: manylinux2014
           - os: ubuntu-latest
             python: 310
             platform_id: manylinux_x86_64
@@ -96,11 +92,12 @@ jobs:
             python: 313
             platform_id: manylinux_x86_64
             manylinux_image: manylinux2014
+          - os: ubuntu-latest
+            python: 314
+            platform_id: manylinux_x86_64
+            manylinux_image: manylinux2014
 
           # Linux aarch64
-          - os: ubuntu-latest
-            python: 39
-            platform_id: manylinux_aarch64
           - os: ubuntu-latest
             python: 310
             platform_id: manylinux_aarch64
@@ -113,23 +110,26 @@ jobs:
           - os: ubuntu-latest
             python: 313
             platform_id: manylinux_aarch64
+          - os: ubuntu-latest
+            python: 314
+            platform_id: manylinux_aarch64
 
           # MacOS x86_64
-          - os: macos-12
-            python: 39
-            platform_id: macosx_x86_64
-          - os: macos-12
+          - os: macos-26-intel
             python: 310
             platform_id: macosx_x86_64
-          - os: macos-12
+          - os: macos-26-intel
             python: 311
             platform_id: macosx_x86_64
-          - os: macos-12
+          - os: macos-26-intel
             python: 312
             platform_id: macosx_x86_64
-          - os: macos-12
+          - os: macos-26-intel
             python: 313
             platform_id: macosx_x86_64
+          - os: macos-26-intel
+            python: 314
+            platform_id: macosx_x86_64
 
     steps:
     - uses: actions/checkout@v6
@@ -145,12 +145,12 @@ jobs:
     - uses: actions/setup-python@v6
       name: Install Python
       with:
-        python-version: '3.9'
+        python-version: '3.11'
 
     - name: Install cibuildwheel
       run: |
         python -m pip install -U pip
-        python -m pip install cibuildwheel>=2.21
+        python -m pip install cibuildwheel>=3.4
 
     - name: Build wheels
       env:
@@ -165,7 +165,7 @@ jobs:
         python -m cibuildwheel --output-dir dist
 
     - name: Store artifacts
-      uses: actions/upload-artifact@v6
+      uses: actions/upload-artifact@v7
       with:
         name: wheel-${{ matrix.python }}-${{ matrix.platform_id }}
         path: ./dist
@@ -178,9 +178,6 @@ jobs:
       matrix:
         include:
         # MacOS arm64
-        - os: macos-14
-          python: 39
-          platform_id: macosx_arm64
         - os: macos-14
           python: 310
           platform_id: macosx_arm64
@@ -193,6 +190,9 @@ jobs:
         - os: macos-14
           python: 313
           platform_id: macosx_arm64
+        - os: macos-14
+          python: 314
+          platform_id: macosx_arm64
 
     steps:
     - uses: actions/checkout@v6
@@ -202,10 +202,10 @@ jobs:
     - uses: actions/setup-python@v6
       name: Install Python
       with:
-        python-version: '3.9'
+        python-version: '3.11'
 
     - name: Install cibuildwheel
-      run: python -m pip install cibuildwheel>=2.21 wheel>=0.42
+      run: python -m pip install cibuildwheel>=3.4 wheel>=0.42
 
     - name: Build wheels
       env:
@@ -216,7 +216,7 @@ jobs:
         python -m cibuildwheel --output-dir dist
 
     - name: Store artifacts
-      uses: actions/upload-artifact@v6
+      uses: actions/upload-artifact@v7
       with:
         name: wheel-${{ matrix.python }}-${{ matrix.platform_id }}
         path: ./dist/*.whl
@@ -239,7 +239,7 @@ jobs:
   #       python-version: ${{ matrix.python-version }}
   #
   #   - name: Download the wheels
-  #     uses: actions/download-artifact@v7
+  #     uses: actions/download-artifact@v8
   #     with:
   #       path: dist/
   #       merge-multiple: true
@@ -287,7 +287,7 @@ jobs:
 
     steps:
     - name: Download the wheels
-      uses: actions/download-artifact@v7
+      uses: actions/download-artifact@v8
       with:
         path: dist/
         merge-multiple: true
diff --git a/build.py b/build_libjpeg.py
similarity index 100%
rename from build.py
rename to build_libjpeg.py
diff --git a/docs/changes/v2.4.0.rst b/docs/changes/v2.4.0.rst
new file mode 100644
index 0000000..ae97080
--- /dev/null
+++ b/docs/changes/v2.4.0.rst
@@ -0,0 +1,7 @@
+.. _v2.4.0:
+
+2.4.0
+=====
+
+* Added support for Python 3.14 and dropped 3.9
+* Updated to v1.71 of libjpeg
diff --git a/lib/libjpeg b/lib/libjpeg
index b911ba5..25f7128 160000
--- a/lib/libjpeg
+++ b/lib/libjpeg
@@ -1 +1 @@
-Subproject commit b911ba54feae159efd1adceda7b07e5a1db611da
+Subproject commit 25f71280913fde7400801772bbf885bb3e873242
diff --git a/pyproject.toml b/pyproject.toml
index 28d5088..e36ce12 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,7 +8,7 @@ requires = [
 build-backend = "poetry.core.masonry.api"
 
 [tool.poetry.build]
-script = "build.py"
+script = "build_libjpeg.py"
 generate-setup-file = true
 
 
@@ -22,11 +22,11 @@ classifiers=[
     "Development Status :: 5 - Production/Stable",
     "Natural Language :: English",
     "Programming Language :: C++",
-    "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",
+    "Programming Language :: Python :: 3.14",
     "Operating System :: MacOS :: MacOS X",
     "Operating System :: POSIX :: Linux",
     "Operating System :: Microsoft :: Windows",
@@ -56,10 +56,10 @@ packages = [
     { include = "libjpeg" },
 ]
 readme = "README.md"
-version = "2.3.0"
+version = "2.4.0"
 
 [tool.poetry.dependencies]
-python = "^3.9"
+python = "^3.10"
 numpy = "^2.0"
 
 [tool.poetry.plugins."pylibjpeg.jpeg_decoders"]
@@ -86,7 +86,7 @@ omit = [
 ]
 
 [tool.mypy]
-python_version = "3.9"
+python_version = "3.10"
 files = "libjpeg"
 exclude = ["libjpeg/tests"]
 show_error_codes = true