diff --git a/README.md b/README.md
index 00a02bbd..90330a45 100644
--- a/README.md
+++ b/README.md
@@ -721,6 +721,20 @@ If you're upgrading from v1 of the Kinde Python SDK, we've prepared comprehensiv
 
 Please refer to Kinde's [contributing guidelines](https://github.com/kinde-oss/.github/blob/489e2ca9c3307c2b2e098a885e22f2239116394a/CONTRIBUTING.md).
 
+### Development Setup
+
+To set up the development environment, install the package in editable mode with development dependencies:
+
+```bash
+pip install -e ".[dev]"
+```
+
+**Note:** The `dev` optional dependency group includes all development tools (pytest, mypy, pylint, etc.). Pylint is conditionally installed based on your Python version:
+- **Python 3.10+**: pylint >=4.0.0
+- **Python 3.9**: pylint >=2.0, <4.0
+
+This ensures compatibility with Python 3.9 while allowing newer Python versions to use the latest pylint features.
+
 ## License
 
 By contributing to Kinde, you agree that your contributions will be licensed under its MIT License.
diff --git a/pyproject.toml b/pyproject.toml
index 7458681f..f1896edf 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -46,6 +46,21 @@ fastapi = [
 flask = [
     "flask >=3.0.0, <4.0.0",
 ]
+dev = [
+    "pytest >=7.4.0",
+    "pytest-cov >=4.1.0",
+    "pytest-django >=4.5.2",
+    "mypy >=1.5.0",
+    "bandit >=1.7",
+    "pylint >=4.0.0; python_version >= '3.10'",
+    "pylint >=2.0, <4.0; python_version < '3.10'",
+    "pycodestyle >=2.0",
+    "pytest-asyncio >=0.26.0",
+    "pytest-timeout >=2.2.0",
+    "black >=24.3.0",
+    "flake8 >=6.1.0",
+    "isort >=5.12.0",
+]
 
 [project.urls]
 "Homepage" = "https://github.com/kinde-oss/kinde-python-sdk"
@@ -71,7 +86,13 @@ pytest-cov = "^4.1.0"
 pytest-django = "^4.5.2"
 mypy = "^1.5.0"
 bandit = "^1.7"
-pylint = "^2.0"
+# pylint is conditionally installed based on Python version to maintain Python 3.9 compatibility
+# Python 3.10+: pylint >=4.0.0 (use pip install -e ".[dev]" for conditional installation)
+# Python 3.9: pylint >=2.0, <4.0
+# Note: Poetry doesn't support multiple conditional version constraints for the same package.
+# This entry uses the Python 3.9-compatible version. Python 3.10+ users can upgrade manually
+# or use: pip install -e ".[dev]" which respects the conditional markers in [project.optional-dependencies]
+pylint = ">=2.0,<4.0"
 pycodestyle = "^2.0"
 pytest-asyncio = "^0.26.0"
 pytest-timeout = "^2.2.0"