diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 4b4af14..554c535 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -27,10 +27,12 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
+        with:
+          python-version: "3.10"
       - name: Install
         run: |
-          pip3 install -r requirements.dev.txt
-          pip3 install .
+          pip3 install .[dev]
       - name: Run tests
         run: python3 -m pytest
   wintest:
@@ -38,10 +40,10 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+      - uses: actions/setup-python@v5
       - name: Install
         run: |
-          pip3 install -r requirements.dev.txt
-          pip3 install .
+          pip3 install .[dev]
       - name: Run tests
         run: python3 -m pytest
   mactest:
@@ -52,8 +54,7 @@ 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 469c522..eb28d06 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,8 @@
 [build-system]
 requires = [
     "scikit-build-core",
-    "Cython"
+    "Cython",
+    "setuptools>=61.2",
 ]
 build-backend = "scikit_build_core.build"
 
@@ -30,6 +31,16 @@ classifiers = [
     "Topic :: Multimedia :: Sound/Audio :: Speech",
 ]
 
+[project.optional-dependencies]
+dev = [
+    "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/"
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