diff --git a/python/mwmatching/__init__.py b/python/mwmatching/__init__.py
index bce2581..b62cb1d 100644
--- a/python/mwmatching/__init__.py
+++ b/python/mwmatching/__init__.py
@@ -2,10 +2,10 @@
 Algorithm for finding a maximum weight matching in general graphs.
 """
 
-from .algorithm import (maximum_weight_matching,
-                        adjust_weights_for_maximum_cardinality_matching,
-                        MatchingError)
-
 __all__ = ["maximum_weight_matching",
            "adjust_weights_for_maximum_cardinality_matching",
            "MatchingError"]
+
+from .algorithm import (maximum_weight_matching,
+                        adjust_weights_for_maximum_cardinality_matching,
+                        MatchingError)
diff --git a/python/pyproject.toml b/python/pyproject.toml
new file mode 100644
index 0000000..ec23650
--- /dev/null
+++ b/python/pyproject.toml
@@ -0,0 +1,15 @@
+
+[build-system]
+requires = ["setuptools >= 61.0"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "mwmatching"
+version = "3.0"
+authors = [{name = "Joris van Rantwijk"}]
+requires-python = ">= 3.7"
+classifiers = [
+    "License :: OSI Approved :: MIT License",
+    "Private :: Do Not Upload"
+]
+