diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 9d7be1b..bed9f31 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,69 +1,62 @@
 on:
   push:
     branches:
-    - master
+      - master
   pull_request:
     branches:
-    - master
+      - master
 
 name: Test
 
 jobs:
   test:
-    runs-on: ubuntu-20.04
-    needs: flake8-lint
+    runs-on: ubuntu-latest
     services:
       selenium:
         image: selenium/standalone-chrome
     name: Test
     strategy:
       matrix:
-        python-version: [ "3.6", "3.7", "3.8", "3.9", "3.10", "3.11" ]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
     steps:
-    - uses: actions/checkout@v2
-    - name: Setup python
-      id: test
-      uses: actions/setup-python@v1
-      with:
-        python-version: "${{ matrix.python-version }}"
-    - name: Install dependencies
-      run: pip install -r requirements-test.txt
-    - name: Test
-      run: pytest tests -vv
+      - uses: actions/checkout@v4
+      - name: Setup python
+        id: test
+        uses: actions/setup-python@v5
+        with:
+          python-version: "${{ matrix.python-version }}"
+      - name: Install dependencies
+        run: pip install -r requirements-test.txt
+      - name: Test
+        run: pytest tests -vv
 
   coverage:
     runs-on: ubuntu-latest
-    needs: flake8-lint
     services:
       selenium:
         image: selenium/standalone-chrome
     steps:
-    - uses: actions/checkout@master
-    - name: Setup Python
-      uses: actions/setup-python@master
-      with:
-        python-version: 3.7
-    - name: Install dependencies
-      run: pip install -r requirements-test.txt
-    - name: Generate coverage report
-      run: pytest --cov=selenium_datatable --cov-report=xml
-    - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v2
-      with:
-        directory: ./coverage/reports/
-        fail_ci_if_error: true
-        files: ./coverage.xml
-        flags: unittests
-        name: codecov-umbrella
-        path_to_write_report: ./coverage/codecov_report.txt
-        verbose: true
+      - uses: actions/checkout@master
+      - name: Setup Python
+        uses: actions/setup-python@master
+        with:
+          python-version: 3.14
+      - name: Install dependencies
+        run: pip install -r requirements-test.txt
+      - name: Generate coverage report
+        run: pytest --cov=selenium_datatable --junitxml=junit.xml -o junit_family=legacy
+      - name: Upload coverage to Codecov
+        if: ${{ !cancelled() }}
+        uses: codecov/test-results-action@v1
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
 
   flake8-lint:
     runs-on: ubuntu-latest
     name: Lint
     steps:
       - name: Check out source repository
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: Set up Python environment
         uses: actions/setup-python@v2
         with:
diff --git a/requirements-test.txt b/requirements-test.txt
index ed04541..2b886d5 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,6 +1,6 @@
-Flask==2.0.3
-pytest==7.0.1
-pytest-cov==3.0.0
-requests==2.27.1
-selenium==3.141.0
-Werkzeug==2.0.2
+Flask>=2.0.3
+pytest>=7.0.1
+pytest-cov>=3.0.0
+requests>=2.27.1
+selenium>=3.141.0
+Werkzeug>=2.0.2
diff --git a/setup.cfg b/setup.cfg
index 216cfe3..b405c02 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -6,7 +6,7 @@ description = A small library for simplifying a table object in selenium
 long_description = file: README.md
 long_description_content_type = text/markdown
 url = https://github.com/fundakol/selenium_datatable
-python_requires = >=3.6
+python_requires = >=3.9
 keywords = selenium table data-table testing
 classifiers =
     Development Status :: 5 - Production/Stable
diff --git a/tests/mock_http_server/__init__.py b/tests/mock_http_server/__init__.py
index 1254390..28f64ca 100644
--- a/tests/mock_http_server/__init__.py
+++ b/tests/mock_http_server/__init__.py
@@ -1,8 +1,8 @@
 from threading import Thread
+from uuid import uuid4
 
-import requests
-from flask import Flask, render_template
-
+from flask import Flask, jsonify, render_template
+from werkzeug.serving import make_server
 
 app = Flask(__name__)
 
@@ -11,6 +11,7 @@
 def index():
     return render_template('index.html')
 
+HOST = '127.0.0.1'
 
 class MockServer(Thread):
 
@@ -18,20 +19,22 @@ def __init__(self, port=5000):
         super().__init__()
         self.port = port
         self.app = app
-        self.url = f'http://localhost:{self.port}'
-
-        self.app.add_url_rule('/shutdown', view_func=self._shutdown_server)
-
-    def _shutdown_server(self):
-        from flask import request
-        if 'werkzeug.server.shutdown' not in request.environ:
-            raise RuntimeError('Not running the development server')
-        request.environ['werkzeug.server.shutdown']()
-        return 'Server shutting down...'
+        self.server = make_server(HOST, self.port, self.app)
+        self.url = f'http://{HOST}:{self.port}'
 
     def shutdown_server(self):
-        requests.get(f'{self.url}/shutdown')
+        self.server.shutdown()
         self.join()
 
+    def add_callback_response(self, url, callback, methods=('GET',)):
+        callback.__name__ = str(uuid4())  # change name of method to mitigate flask exception
+        self.app.add_url_rule(url, view_func=callback, methods=methods)
+
+    def add_json_response(self, url, serializable, methods=('GET',)):
+        def callback():
+            return jsonify(serializable)
+
+        self.add_callback_response(url, callback, methods=methods)
+
     def run(self):
-        self.app.run(port=self.port)
+        self.server.serve_forever()