diff --git a/Makefile b/Makefile
index 010121f3..e99b3ac9 100644
--- a/Makefile
+++ b/Makefile
@@ -90,7 +90,7 @@ validate-newsfragments:
 check-docs: build-docs validate-newsfragments
 
 build-docs:
-	sphinx-apidoc -o docs/ . setup.py "*conftest*" tests/
+	sphinx-apidoc -o docs/ . "*conftest*" tests/
 	$(MAKE) -C docs clean
 	$(MAKE) -C docs html
 	$(MAKE) -C docs doctest
diff --git a/pyproject.toml b/pyproject.toml
index 04f2449a..c5adfb11 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -221,12 +221,7 @@ values = ["alpha", "beta", "stable"]
 [tool.bumpversion.part.devnum]
 
 [[tool.bumpversion.files]]
-filename = "setup.py"
-search = "version=\"{current_version}\""
-replace = "version=\"{new_version}\""
-
-[[tool.bumpversion.files]]
-filename = "pyproject.toml"              # Keep pyproject.toml version in sync
+filename = "pyproject.toml"
 search = 'version = "{current_version}"'
 replace = 'version = "{new_version}"'