diff --git a/pyproject.toml b/pyproject.toml
index f707a762a9810fc680f049da3c478a4408aadfd3..ea690f72cff53eb4e8bfd04fb6bd8caa6d940f3d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ name = 'scikit-multimodallearn'
 dynamic = ["version", "dependencies"]
 requires-python = '>=3.6'
 
-license = {"BSD-3-Clause"}
+license = "BSD-3-Clause"
 license-files = ["license.txt"]
 readme = {file = "README.rst", content-type = "text/x-rst"}
 description = 'A scikit-learn compatible package for multimodal Classifiers'