diff --git a/pyproject.toml b/pyproject.toml
index d687f62..f3abe4e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,5 @@
 [build-system]
-requires = ["setuptools>=77", "setuptools-scm[toml]>=8"]
+requires = ["setuptools>=80", "setuptools-scm[toml]>=8,<10"]
 build-backend = "setuptools.build_meta"
 
 [project]
diff --git a/tests/package/test_typing_contract.py b/tests/package/test_typing_contract.py
index a994054..0eb5bb4 100644
--- a/tests/package/test_typing_contract.py
+++ b/tests/package/test_typing_contract.py
@@ -11,3 +11,7 @@ def test_package_declares_py_typed_marker() -> None:
 
 def test_package_declares_runtime_protobuf_dependency() -> None:
     assert '"protobuf>=6.33.5,<7.0"' in PYPROJECT_TEXT
+
+
+def test_build_backend_pins_setuptools_scm_below_warninging_major_version() -> None:
+    assert 'requires = ["setuptools>=80", "setuptools-scm[toml]>=8,<10"]' in PYPROJECT_TEXT