diff --git a/.github/workflows/branchbuild.yml b/.github/workflows/branchbuild.yml
index d6fe4a8f..6eb53953 100644
--- a/.github/workflows/branchbuild.yml
+++ b/.github/workflows/branchbuild.yml
@@ -18,7 +18,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install numpy rapidfuzz_capi Cython==3.0.0b2
+          pip install numpy rapidfuzz_capi Cython==3.0.3
 
       - name: Generate cython
         run: |
diff --git a/.github/workflows/releasebuild.yml b/.github/workflows/releasebuild.yml
index ff1c3969..8266e4de 100644
--- a/.github/workflows/releasebuild.yml
+++ b/.github/workflows/releasebuild.yml
@@ -22,7 +22,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install pytest hypothesis pandas mypy rapidfuzz_capi Cython==3.0.0b2
+          pip install pytest hypothesis pandas mypy rapidfuzz_capi Cython==3.0.3
 
       # The cythonized files allow installation from the sdist without cython
       - name: Generate cython
@@ -60,7 +60,7 @@ jobs:
       fail-fast: false
       matrix:
         arch: [auto32, auto64, ARM64]
-        python_tag: ["cp37-*", "cp38-*", "cp39-*", "cp310-*", "cp311-*", "pp37-*", "pp38-*", "pp39-*"]
+        python_tag: ["cp37-*", "cp38-*", "cp39-*", "cp310-*", "cp311-*", "cp312-*", "pp37-*", "pp38-*", "pp39-*"]
         exclude:
           # PyPy only supports x86_64 on Windows
           - arch: auto32
@@ -101,7 +101,7 @@ jobs:
       - uses: actions/setup-python@v4
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.12.1
+        uses: pypa/cibuildwheel@v2.15.0
         with:
           package-dir: rapidfuzz.tar.gz
           output-dir: wheelhouse
@@ -119,7 +119,7 @@ jobs:
       fail-fast: false
       matrix:
         arch: [x86_64, arm64, universal2]
-        python_tag: ["cp37-*", "cp38-*", "cp39-*", "cp310-*", "cp311-*", "pp37-*", "pp38-*", "pp39-*"]
+        python_tag: ["cp37-*", "cp38-*", "cp39-*", "cp310-*", "cp311-*", "cp312-*", "pp37-*", "pp38-*", "pp39-*"]
         exclude:
           # MacOS Arm only supported since Python 3.8
           - arch: arm64
@@ -160,7 +160,7 @@ jobs:
         run: cp dist/*.tar.gz rapidfuzz.tar.gz
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.12.1
+        uses: pypa/cibuildwheel@v2.15.0
         with:
           package-dir: rapidfuzz.tar.gz
           output-dir: wheelhouse
@@ -178,7 +178,7 @@ jobs:
       fail-fast: false
       matrix:
         arch: [auto, aarch64, ppc64le, s390x]
-        python_tag: ["cp37-*", "cp38-*", "cp39-*", "cp310-*", "cp311-*", "pp37-*", "pp38-*", "pp39-*"]
+        python_tag: ["cp37-*", "cp38-*", "cp39-*", "cp310-*", "cp311-*", "cp312-*", "pp37-*", "pp38-*", "pp39-*"]
         exclude:
           # PyPy builds not available for these platforms
           - arch: ppc64le
@@ -217,7 +217,7 @@ jobs:
         name: Set up QEMU
 
       - name: Build wheel
-        uses: pypa/cibuildwheel@v2.12.1
+        uses: pypa/cibuildwheel@v2.15.0
         with:
           package-dir: rapidfuzz.tar.gz
           output-dir: wheelhouse
diff --git a/pyproject.toml b/pyproject.toml
index 7c6e292b..d76460bb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,7 +2,7 @@
 requires = [
     "setuptools>=42",
     "scikit-build~=0.17.0",
-    "Cython==3.0.0b2"
+    "Cython==3.0.3"
 ]
 build-backend = "backend"
 backend-path = ["_custom_build"]
diff --git a/setup.py b/setup.py
index 16d6d6c9..eafe043a 100644
--- a/setup.py
+++ b/setup.py
@@ -29,6 +29,7 @@ def show_message(*lines):
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
         "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
         "License :: OSI Approved :: MIT License",
     ],
     "packages": ["rapidfuzz", "rapidfuzz.distance", "rapidfuzz.__pyinstaller"],
diff --git a/src/rapidfuzz/distance/metrics_cpp.pyx b/src/rapidfuzz/distance/metrics_cpp.pyx
index 3d4940bf..0a89219b 100644
--- a/src/rapidfuzz/distance/metrics_cpp.pyx
+++ b/src/rapidfuzz/distance/metrics_cpp.pyx
@@ -289,7 +289,7 @@ def levenshtein_opcodes(s1, s2, *, processor=None, score_hint=None):
     ops.editops = levenshtein_editops_func(s1_proc.string, s2_proc.string, c_score_hint)
     return ops.as_opcodes()
 
-cdef void KwargsDeinit(RF_Kwargs* self):
+cdef void KwargsDeinit(RF_Kwargs* self) noexcept:
     free(<void*>self.context)
 
 cdef bool LevenshteinKwargsInit(RF_Kwargs* self, dict kwargs) except False:
diff --git a/tools/sdist.patch b/tools/sdist.patch
index 3c4a652d..9999cd7d 100644
--- a/tools/sdist.patch
+++ b/tools/sdist.patch
@@ -7,7 +7,7 @@ index 77671b1..7692f90 100644
  requires = [
      "setuptools>=42",
 -    "scikit-build~=0.17.0",
--    "Cython==3.0.0b2"
+-    "Cython==3.0.3"
 +    "scikit-build~=0.17.0"
  ]
  build-backend = "backend"