diff --git a/pyproject.toml b/pyproject.toml
index 0d01e7702..e5b265576 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -83,9 +83,6 @@ Homepage = "https://weblate.org/"
 "Source Code" = "https://github.com/WeblateOrg/language-data"
 Twitter = "https://twitter.com/WeblateOrg"
 
-[tool.black]
-target-version = ['py39']
-
 [tool.check-manifest]
 ignore = [
   "*.csv",
@@ -117,9 +114,6 @@ skip = '*.po,*.pot,*.csv,weblate_language_data/aliases.py,weblate_language_data/
 [tool.isort]
 profile = "black"
 
-[tool.ruff]
-target-version = "py39"
-
 [tool.ruff.format]
 docstring-code-format = true