diff --git a/pyproject.toml b/pyproject.toml
index 176ca5333..22ae77bdc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,5 +1,6 @@
 [project]
 requires-python = ">=3.10"
+license = "GPL-3.0-only"
 
 [build-system]
 requires = [