Update pyproject.toml

Author: YonkoSam

pyproject.toml

@@ -48,7 +48,8 @@ dev = [
     "respx>=0.20.0,<0.21.0",
     "mypy>=1.0.0,<2.0.0",
     "ruff>=0.1.0,<0.2.0",
-    "pre-commit>=3.0.0,<4.0.0"
+    "pre-commit>=3.0.0,<4.0.0",
+     "flake8>=6.0.0,<7.0.0"
 ]
 
 [tool.hatch.version]