diff --git a/pyproject.toml b/pyproject.toml
index 318b3ae5..c7a1e93c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -89,7 +89,7 @@ test-run = [
 # Groups of tasks
 format.default_item_type = "cmd"
 format.sequence = [
-  "isort .",
+  "ruff check . --select I --fix", # equivalent to "isort ."
   "black .",
 ]
 
@@ -98,9 +98,8 @@ lint.default_item_type = "cmd"
 lint.sequence = [
   "poetry --version",
   "poetry check",
-  "flakeheaven --version",
-  "flakeheaven plugins",
-  "flakeheaven lint",
+  "ruff --version",
+  "ruff .",
 ]
 
 test = [
@@ -108,11 +107,6 @@ test = [
   "test-run",
 ]
 
-[tool.isort]
-profile = "black"
-force_single_line = true
-known_first_party = ["jrnl", "tests"]
-
 [tool.pytest.ini_options]
 minversion = "6.0"
 required_plugins = [
@@ -146,6 +140,7 @@ select = [
   'E',
   'F',
   'W',
+  'I',
   'ASYNC',
   'S110', # try-except-pass
   'S112', # try-except-continue
@@ -160,33 +155,13 @@ select = [
 ]
 exclude = [".git", ".tox", ".venv", "node_modules"]
 
+[tool.ruff.isort]
+force-single-line = true
+known-first-party = ["jrnl", "tests"]
+
 [tool.ruff.per-file-ignores]
 "__init__.py" = ["F401"] # unused imports
 
-[tool.flakeheaven]
-max_line_length = 88
-exclude = [".git", ".tox", ".venv", "node_modules"]
-
-[tool.flakeheaven.plugins]
-"py*" = ["+*"]
-pycodestyle = [
-  "-E101",
-  "-E111", "-E114", "-E115", "-E116", "-E117",
-  "-E12*",
-  "-E13*",
-  "-E2*",
-  "-E3*",
-  "-E401",
-  "-E5*",
-  "-E70",
-  "-W1*", "-W2*", "-W3*", "-W5*",
-]
-"flake8-*" = ["+*"]
-flake8-black = ["-BLK901"]
-
-[tool.flakeheaven.exceptions."jrnl/journals/__init__.py"]
-pyflakes = ["-F401"]
-
 [build-system]
 requires = ["poetry-core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"