diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 491351b..0acc876 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -31,8 +31,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install flake8
-          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+          pip install -e .[dev]
       - name: Lint with flake8
         run: |
           # stop the build if there are Python syntax errors or undefined names
@@ -50,10 +49,12 @@ jobs:
         if: env.COVERAGE == 1
         run: |
           coverage run -m unittest tests/*.py
-      - name: Coverage
+          coverage xml
+      - name: Upload coverage to Codecov
         env:
           COVERAGE: ${{ matrix.coverage }}
         if: env.COVERAGE == 1
-        run: |
-          bash <(curl -s https://codecov.io/bash)
-          rm .coverage coverage.xml
+        uses: codecov/codecov-action@v4
+        with:
+          file: ./coverage.xml
+          fail_ci_if_error: false
diff --git a/pyproject.toml b/pyproject.toml
index 19d6cc9..4392b9e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,12 +17,9 @@ readme = "README.md"
 requires-python = ">=3.8"
 dependencies = [
     "multidimensional-urlencode==0.0.4",
-    "nose==1.3.7",
     "requests==2.32.4",
-    "coverage==4.5.4",
-    "pook==1.3.0",
-    "hatchling >= 1.26"
 ]
+
 classifiers = [
     "Development Status :: 5 - Production/Stable",
     "Environment :: Other Environment",
@@ -39,7 +36,15 @@ classifiers = [
     "Topic :: Software Development :: Libraries :: Python Modules",
 ]
 license = "MIT"
-license-files = ["LICEN[CS]E*"]
+license-files = ["LICENSE"]
+
+[project.optional-dependencies]
+dev = [
+    "nose==1.3.7",
+    "coverage==4.5.4",
+    "pook==1.3.0",
+    "flake8",
+]
 
 [project.urls]
 Homepage = "https://github.com/retailcrm/api-client-python"
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 508eb50..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-multidimensional-urlencode==0.0.4
-nose==1.3.7
-requests==2.32.4
-coverage==4.5.4
-pook==1.3.0
-setuptools<81
-hatchling >= 1.26
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index d8e9a6f..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,4 +0,0 @@
-[metadata]
-# This includes the license file(s) in the wheel.
-# https://wheel.readthedocs.io/en/stable/user_guide.html#including-license-files-in-the-generated-wheel-file
-license_files = LICENSE
\ No newline at end of file
diff --git a/setup.py b/setup.py
deleted file mode 100644
index 2778cf1..0000000
--- a/setup.py
+++ /dev/null
@@ -1,44 +0,0 @@
-# coding=utf-8
-
-"""
-Setup file
-"""
-
-import os
-from setuptools import setup
-
-
-def read(filename):
-    """Read readme for long description"""
-    return open(os.path.join(os.path.dirname(__file__), filename)).read()
-
-
-setup(
-    name='retailcrm',
-    version='5.2.0',
-    description='RetailCRM API client',
-    long_description=read('README'),
-    url='https://github.com/retailcrm/api-client-python',
-    author='RetailCRM',
-    author_email='support@retailcrm.pro',
-    keywords='crm saas rest e-commerce',
-    license='MIT',
-    packages=['retailcrm', 'retailcrm/versions'],
-    package_data={},
-    install_requires=['requests', 'multidimensional_urlencode', 'nose', 'coverage', 'pook', 'setuptools', 'hatchling'],
-    classifiers=[
-        'Development Status :: 5 - Production/Stable',
-        'Environment :: Other Environment',
-        'Intended Audience :: Developers',
-        'Operating System :: OS Independent',
-        'Programming Language :: Python',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.8',
-        'Programming Language :: Python :: 3.9',
-        'Programming Language :: Python :: 3.10',
-        'Programming Language :: Python :: 3.11',
-        'Programming Language :: Python :: 3.12',
-        'Programming Language :: Python :: 3 :: Only',
-        'Topic :: Software Development :: Libraries :: Python Modules',
-    ]
-)
diff --git a/tests/v5_tests.py b/tests/v5_tests.py
index 81129a0..dfe72c8 100644
--- a/tests/v5_tests.py
+++ b/tests/v5_tests.py
@@ -4085,45 +4085,45 @@ def test_offers(self):
         """
 
         (pook.get(os.getenv('RETAILCRM_URL') + '/api/v5/store/offers')
-        .headers({'X-API-KEY': os.getenv('RETAILCRM_KEY')})
-        .params({'filter[site]': 'https://retailcrm.pro'})
-        .reply(200)
-        .headers(self.__header)
-        .json(
-            {
-                'success': 'true',
-                'pagination': {
-                    'limit': 20,
-                    'totalCount': 1,
-                    'currentPage': 1,
-                    'totalPageCount': 1
-                },
-                'offers': [
-                    {
-                        'images': [],
-                        'id': 33937,
-                        'site': 'https://retailcrm.pro',
-                        'name': 'Shirt',
-                        'article': 'SHIRT-BLACK',
-                        'prices': {
-                            "priceType": "base",
-                            "price": 4,
-                            "ordering": 100,
-                            "currency": "EUR"
-                        },
-                        'purchasePrice': 1,
-                        'vatRate': 'none',
-                        'product': {},
-                        'properties': {
-                            'color': 'black'
-                        },
-                        'quantity': 10,
-                        'active': True,
-                        'barcode': '12345'
-                    }
-                ]
-            }
-        )
+            .headers({'X-API-KEY': os.getenv('RETAILCRM_KEY')})
+            .params({'filter[site]': 'https://retailcrm.pro'})
+            .reply(200)
+            .headers(self.__header)
+            .json(
+                {
+                    'success': 'true',
+                    'pagination': {
+                        'limit': 20,
+                        'totalCount': 1,
+                        'currentPage': 1,
+                        'totalPageCount': 1
+                    },
+                    'offers': [
+                        {
+                            'images': [],
+                            'id': 33937,
+                            'site': 'https://retailcrm.pro',
+                            'name': 'Shirt',
+                            'article': 'SHIRT-BLACK',
+                            'prices': {
+                                "priceType": "base",
+                                "price": 4,
+                                "ordering": 100,
+                                "currency": "EUR"
+                            },
+                            'purchasePrice': 1,
+                            'vatRate': 'none',
+                            'product': {},
+                            'properties': {
+                                'color': 'black'
+                            },
+                            'quantity': 10,
+                            'active': True,
+                            'barcode': '12345'
+                        }
+                    ]
+                }
+            )
         )
 
         response = self.client.offers({'site': 'https://retailcrm.pro'})