diff --git a/setup.cfg b/setup.cfg
index 1ba72f1..fa9b6e5 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -36,7 +36,9 @@ console_scripts =
 
 [options.package_data]
 case_utils = py.typed
-case_utils.ontology = *.ttl ontology_and_version_iris.txt
+case_utils.ontology =
+    *.ttl
+    ontology_and_version_iris.txt
 
 [flake8]
 # https://black.readthedocs.io/en/stable/guides/using_black_with_other_tools.html#flake8