diff --git a/pyproject.toml b/pyproject.toml
index cee1071..52e1a0b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,13 +10,16 @@ packages = [
 
 
 [tool.poetry.dependencies]
-python = ">=3.8"
+python = "^3.12"
 
 
 [tool.poetry.scripts]
 gendiff = "gendiff.scripts.gendiff:main"
 
 
+[tool.poetry.group.dev.dependencies]
+flake8 = "^7.1.0"
+
 [build-system]
 requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"