diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000000..59f2d8d8f7
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,22 @@
+[tool.ruff]
+line-length = 160
+target-version = 'py37'
+select = ['E', 'F']
+ignore = ['E741', 'E402', 'E722', 'E401']
+builtins = ['_']
+
+[tool.ruff.per-file-ignores]
+"src/calibre/ebooks/unihandecode/unicodepoints.py" = ["E501"]
+"src/qt/__init__.py" = ["E501"]
+
+[tool.black]
+target-version = ['py37']
+
+[tool.isort]
+profile = "black"
+combine_as_imports = true
+multi_line_output = 5
+known_future_library = "__python__"
+known_third_party = "qt"
+known_standard_library = "aes,elementmaker,encodings"
+known_first_party = "calibre_extensions"
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index 6b0784ada4..0000000000
--- a/setup.cfg
+++ /dev/null
@@ -1,13 +0,0 @@
-[flake8]
-max-line-length = 160
-builtins = _,__,P,I,lopen,icu_lower,icu_upper,icu_title,ngettext,connect_lambda
-ignore = E12,E203,E22,E231,E241,E401,E402,E503,E731,W391,E722,E741,W504,W203
-
-[isort]
-profile = black
-combine_as_imports = True
-multi_line_output = 5
-known_future_library = __python__
-known_third_party = qt
-known_standard_library = aes,elementmaker,encodings
-known_first_party = calibre_extensions