diff --git a/src/bio2bel_kegg/models.py b/src/bio2bel_kegg/models.py
index 1211ca0..8db904e 100644
--- a/src/bio2bel_kegg/models.py
+++ b/src/bio2bel_kegg/models.py
@@ -61,7 +61,8 @@ def serialize_to_pathway_node(self) -> pybel.dsl.BiologicalProcess:
     def get_gene_set(self) -> Set['Protein']:
         """Return the genes associated with the pathway (gene set).
 
-        Note this function restricts to HGNC symbols genes."""
+        Note this function restricts to HGNC symbols genes.
+        """
         return {
             protein.hgnc_symbol
             for protein in self.proteins