diff --git a/pyproject.toml b/pyproject.toml
index a714ef9..cd3dd07 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -21,7 +21,7 @@ disable = true  # Requires confirmation when publishing to pypi.
 name = "zampy"
 description = "python package for getting Land Surface Model input data."
 readme = "README.md"
-license = "Apache 2.0"
+license = "Apache-2.0"
 requires-python = ">=3.10, <3.12"
 authors = [
   {email = "b.schilperoort@esciencecenter.nl"},