diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 4b4af14..01cd56b 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -29,8 +29,7 @@ jobs:
         uses: actions/checkout@v4
       - name: Install
         run: |
-          pip3 install -r requirements.dev.txt
-          pip3 install .
+          pip3 install .[dev]
       - name: Run tests
         run: python3 -m pytest
   wintest:
@@ -40,8 +39,7 @@ jobs:
         uses: actions/checkout@v4
       - name: Install
         run: |
-          pip3 install -r requirements.dev.txt
-          pip3 install .
+          pip3 install .[dev]
       - name: Run tests
         run: python3 -m pytest
   mactest:
@@ -52,8 +50,7 @@ jobs:
       - uses: actions/setup-python@v5
       - name: Install
         run: |
-          pip install -r requirements.dev.txt
-          pip install .
+          pip install .[dev]
       - name: Run tests
         run: python -m pytest
   nodetest:
diff --git a/MANIFEST.in b/MANIFEST.in
index e9a67fa..c1b0686 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -3,7 +3,6 @@ include LICENSE
 include README.md
 include TODO.md
 include config.h.in
-include requirements.dev.txt
 include docs/Makefile
 include docs/gen_config.py
 include docs/make.bat
diff --git a/pyproject.toml b/pyproject.toml
index ee96eb3..ddd5f6f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [build-system]
 requires = [
-     	 "scikit-build-core",
-	 "Cython"
+    "scikit-build-core",
+    "Cython"
 ]
 build-backend = "scikit_build_core.build"
 
@@ -11,7 +11,7 @@ dynamic = ["version"]
 description = "An even smaller speech recognizer"
 readme = "README.md"
 authors = [
-        {name = "David Huggins-Daines", email = "dhd@ecolingui.ca"}
+    {name = "David Huggins-Daines", email = "dhd@ecolingui.ca"}
 ]
 keywords = ["asr", "speech"]
 classifiers = [
@@ -29,6 +29,18 @@ classifiers = [
     "Topic :: Multimedia :: Sound/Audio :: Speech",
 ]
 
+[project.optional-dependencies]
+dev = [
+    "scikit-build",
+    "Cython",
+    "pytest",
+    "numpy",
+    "pre-commit",
+    "black==24.3.0",
+    "isort",
+    "mypy==0.991",
+]
+
 [project.urls]
 Homepage = "https://github.com/ReadAlongs/SoundSwallower"
 Documentation = "https://soundswallower.readthedocs.io/"
@@ -39,22 +51,23 @@ Issues = "https://github.com/ReadAlongs/SoundSwallower/issues"
 soundswallower = "soundswallower.cli:main"
 
 [tool.cibuildwheel]
-# Build a reduced selection of binaries as there are tons of them
+# Build binaries for supported versions of Python
 build = [
-      "cp38-*",
-      "cp39-*",
-      "cp310-*",
-      "cp311-*",
-      "cp312-*",
+    "cp38-*",
+    "cp39-*",
+    "cp310-*",
+    "cp311-*",
+    "cp312-*",
+    "cp313-*",
 ]
 # Build only universal wheels for Mac where possible, and skip 32-bit
 # builds to avoid building a gigabyte of stuff all the time
 skip = [
-     "cp*-macosx_x86_64",
-     "cp*-macosx_arm64",
-     "*_i686",
-     "*musl*",
-     "*-win32",
+    "cp*-macosx_x86_64",
+    "cp*-macosx_arm64",
+    "*_i686",
+    "*musl*",
+    "*-win32",
 ]
 
 [tool.cibuildwheel.macos]
diff --git a/requirements.dev.txt b/requirements.dev.txt
deleted file mode 100644
index 15e43ae..0000000
--- a/requirements.dev.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-scikit-build
-Cython
-pytest
-numpy
-pre-commit
-black==24.3.0
-isort
-mypy==0.991