diff --git a/pyproject.toml b/pyproject.toml
index 1aa50163..3923ecf4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,6 @@
+# Copyright 2017-2020 Palantir Technologies, Inc.
+# Copyright 2021- Python Language Server Contributors.
+
 [build-system]
 requires = ["setuptools>=61.2.0", "wheel", "setuptools_scm[toml]>=3.4.3"]
 build-backend = "setuptools.build_meta"
diff --git a/setup.cfg b/setup.cfg
index 0b2f84ca..933ff6a4 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,3 +1,6 @@
+# Copyright 2017-2020 Palantir Technologies, Inc.
+# Copyright 2021- Python Language Server Contributors.
+
 [pycodestyle]
 ignore = E226, E722, W504
 max-line-length = 120