2 files changed, 1 insertions, 1 deletions

diff --git a/pyproject.toml b/pyproject.toml
index 36187efd1..eddde46d9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,6 @@
 [build-system]
 requires = ["setuptools", "wheel"]
+build-backend = "setuptools.build_meta"
 
 [tool.black]
 line-length = 79
diff --git a/setup.py b/setup.py
index 09d05923a..411f5d9a0 100644
--- a/setup.py
+++ b/setup.py
@@ -41,7 +41,6 @@ tests_require = [
     'zope.component >= 4.0',  # py3 compat
 ]
 
-
 docs_extras = [
     'Sphinx >= 1.8.1',  # Unicode characters in tree diagrams
     'docutils',