diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 04e2143..fa18140 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -8,9 +8,9 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: '3.9'
       - name: Install Dependencies
@@ -18,10 +18,10 @@ jobs:
           sudo apt-get install pandoc
           python -m pip install --upgrade pip
           pip install pypandoc
-          pip install -r requirements.txt
+          pip install -e ".[dev,test]"
       - name: Test Package
         run: |
-          python setup.py test
+          python -m unittest
       - name: Build Package
         run: |
           python setup.py bdist_wheel sdist
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e7b49be..2158f10 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -11,24 +11,24 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ ubuntu-20.04, macos-latest ]
+        os: [ ubuntu-latest, macos-latest ]
         python-version: [ 3.8, 3.9 ]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version}}
       - name: Install Dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install -r requirements.txt
+          pip install -e ".[dev,test]"
       - name: Lint with PyCodeStyle
         run: |
           pycodestyle .
       - name: Run Unit Tests
         run: |
-          python setup.py test
+          python -m unittest
       - name: Build a Wheel
         run: |
           python setup.py bdist_wheel
diff --git a/README.md b/README.md
index 43fd2ed..a792a80 100644
--- a/README.md
+++ b/README.md
@@ -117,7 +117,7 @@ $ make html
 First install the development requirements by running:
 
 ```
-$ pip install -r requirements.txt
+pip install -e ".[dev,test]"
 ```
 
 After you've installed the requirements, decide on the development work you
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index a721f22..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1,11 +0,0 @@
-behave == 1.2.5
-coverage == 4.4.1
-psutil >= 5.2.2
-pycodestyle >= 2.3.1
-setuptools
-six
-sphinx == 1.4.8
-sphinx-argparse == 0.1.15
-sphinx_rtd_theme == 0.2.4
-sphinxcontrib-napoleon == 0.5.3
-wheel
diff --git a/setup.cfg b/setup.cfg
index fcad35f..22f5e1c 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -11,3 +11,19 @@ universal = 1
 [behave]
 color = True
 summary = True
+
+[options.extras_require]
+  dev =
+    behave==1.2.5
+    coverage==4.4.1
+    psutil>=5.2.2
+    pycodestyle>=2.3.1
+    setuptools>=70.2.0
+    six
+    sphinx==1.4.8
+    sphinx-argparse==0.1.15
+    sphinx_rtd_theme==0.2.4
+    sphinxcontrib-napoleon==0.5.3
+    wheel
+  test =
+    mock==2.0.0