diff --git a/gseapy/gsva.py b/gseapy/gsva.py
index 419f9a5..42c4a5a 100644
--- a/gseapy/gsva.py
+++ b/gseapy/gsva.py
@@ -3,6 +3,7 @@
 
 import os
 from typing import Dict, List, Optional, Union
+
 import numpy as np
 import pandas as pd