diff --git a/pyproject.toml b/pyproject.toml
index 12de60e..ea934c1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,11 +18,11 @@ maintainers = [
 description = "modflowapi is an extension to the xmipy Python package"
 readme = "README.md"
 keywords = ["MODFLOW", "groundwater", "hydrogeology", "bmi", "xmi"]
-license = {text = "CC0"}
+license = "CC0-1.0"
+license-files = ["LICENSE"]
 classifiers = [
     "Development Status :: 4 - Beta",
     "Intended Audience :: Science/Research",
-    "License :: CC0 1.0 Universal (CC0 1.0) Public Domain Dedication",
     "Programming Language :: Python :: 3",
     "Programming Language :: Python :: 3 :: Only",
     "Programming Language :: Python :: 3.10",