diff --git a/pyproject.toml b/pyproject.toml
index 19cdfe9dbb..8c4c3a0433 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,6 +7,7 @@ dependencies = [
     "numpy>=1.16.0,<3"
 ]
 readme = {file = "README.md", content-type = "text/markdown"}
+license = "Apache-2.0"
 license-files = ["LICENSE"]
 classifiers=[
     "Intended Audience :: Developers",