diff --git a/dev-environment.yml b/dev-environment.yml
index 156ed64..afb1ce9 100644
--- a/dev-environment.yml
+++ b/dev-environment.yml
@@ -29,6 +29,7 @@ dependencies:
   - black
   - build
   - flake8
+  - flake8-pyproject
   - isort
   - pytest
   - pytest-cov
diff --git a/pyproject.toml b/pyproject.toml
index 53dd108..534705e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -76,5 +76,13 @@ include-package-data = false
 where = ["src"]
 namespaces = false
 
+# Thanks to Flake8-pyproject, we can configure flake8 here!
+[tool.flake8]
+exclude = ["bin", "build", "docs", "dist"]
+extend-ignore = ["E203"]
+# See https://black.readthedocs.io/en/stable/guides/using_black_with_other_tools.html#flake8
+max-line-length = 88
+min_python_version = "3.8"
+
 [tool.isort]
 profile = "black"
diff --git a/setup.cfg b/setup.cfg
deleted file mode 100644
index db9f4e2..0000000
--- a/setup.cfg
+++ /dev/null
@@ -1,8 +0,0 @@
-# TODO: Move all configuration into pyproject.toml
-
-[flake8]
-# See https://black.readthedocs.io/en/stable/guides/using_black_with_other_tools.html#flake8
-max-line-length = 88
-extend-ignore = E203
-# Unfortunately, flake8 doesn't pick up on our declaration in pyproject.toml
-min_python_version = 3.8.0