diff --git a/.github/workflows/python-tests.yml b/.github/workflows/python-tests.yml
index d5946904..1fbd2164 100644
--- a/.github/workflows/python-tests.yml
+++ b/.github/workflows/python-tests.yml
@@ -39,7 +39,7 @@ jobs:
     - name: Install Python dependencies
       run: |
         python -m pip install --upgrade pip
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        pip install .[build]
     - name: Test building documentation
       run: |
         cd docs
@@ -49,8 +49,7 @@ jobs:
         ruff check .
     - name: Run unit tests
       run: |
-        coverage run tests.py
-        coverage json
+        pytest --cov --cov-report=xml tests.py
     - name: Test sample DMARC reports
       run: |
         pip install -e .
@@ -61,3 +60,5 @@ jobs:
         hatch build
     - name: Upload coverage to Codecov
       uses: codecov/codecov-action@v4
+      with:
+          token: ${{ secrets.CODECOV_TOKEN }}
diff --git a/build.sh b/build.sh
index ce37510d..34e9d84c 100755
--- a/build.sh
+++ b/build.sh
@@ -7,7 +7,7 @@ if [ ! -d "venv" ]; then
 fi
 
 . venv/bin/activate
-pip install -U -r requirements.txt
+pip install .[build]
 ruff format .
 cd docs
 make clean 
diff --git a/pyproject.toml b/pyproject.toml
index d6d1d719..7ffc954b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,11 +50,23 @@ dependencies = [
     "msgraph-core==0.2.2",
     "opensearch-py>=2.4.2,<=3.0.0",
     "publicsuffixlist>=0.10.0",
+    "pygelf>=0.4.2",
     "requests>=2.22.0",
     "tqdm>=4.31.1",
     "urllib3>=1.25.7",
     "xmltodict>=0.12.0",
-    "pygelf>=0.4.2",
+]
+
+[project.optional-dependencies]
+build = [
+    "hatch",
+    "myst-parser[linkify]",
+    "nose",
+    "pytest",
+    "pytest-cov",
+    "ruff",
+    "sphinx",
+    "sphinx_rtd_theme",
 ]
 
 [project.scripts]
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index ba292bb6..00000000
--- a/requirements.txt
+++ /dev/null
@@ -1,46 +0,0 @@
-tqdm>=4.31.1
-pygments>=2.11.1
-dnspython>=2.0.0
-expiringdict>=1.1.4
-urllib3>=1.25.7
-requests>=2.22.0
-publicsuffixlist>=0.10.0
-xmltodict>=0.12.0
-geoip2>=3.0.0
-imapclient>=2.1.0
-dateparser>=1.1.1
-elasticsearch<7.14.0
-elasticsearch-dsl>=7.4.0
-opensearch-py>=2.4.2,<=3.0.0
-kafka-python-ng>=2.2.2
-mailsuite>=1.9.17
-pygelf
-nose>=1.3.7
-wheel>=0.37.0
-ruff
-jinja2>=2.10.1
-packaging>=19.1
-imagesize>=1.1.0
-alabaster>=0.7.12
-Babel>=2.7.0
-docutils<0.18,>=0.14
-sphinx>=1.0.5
-sphinx_rtd_theme>=0.4.3
-codecov>=2.0.15
-lxml>=4.4.0
-boto3>=1.16.63
-msgraph-core==0.2.2
-azure-identity>=1.8.0
-azure-monitor-ingestion>=1.0.0
-google-api-core>=2.4.0
-google-api-python-client>=2.35.0
-google-auth>=2.3.3
-google-auth-httplib2>=0.1.0
-google-auth-oauthlib>=0.4.6
-hatch>=1.5.0
-myst-parser>=0.18.0
-myst-parser[linkify]
-requests
-bs4
-pytest
-