diff --git a/setup.cfg b/setup.cfg
index 6c0638b..f5f72b1 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -3,7 +3,7 @@ name = solarmach
 author = Jan Gieseler
 author_email = jan.gieseler@utu.fi
 license = BSD 3-clause
-license_file = licenses/LICENSE.rst
+license_files = licenses/LICENSE.rst
 url = https://github.com/jgieseler/solarmach
 description = Multi-spacecraft longitudinal configuration plotter
 long_description = file: README.rst