diff --git a/pyproject.toml b/pyproject.toml
index dacfc0b4f..7bc655602 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -5,7 +5,7 @@ authors = [{ name = "PyWhy contributors" }]
 description = "This package contains several methods for calculating Conditional Average Treatment Effects"
 readme = "README.md"
 keywords = ["treatment-effect"]
-license = "MIT"
+license = { text = "MIT" }
 dynamic = ["version"]
 
 classifiers = [