diff --git a/.gitignore b/.gitignore
index fb128c5..de89c8a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -64,3 +64,4 @@ results*
 perfs_benchmark.log
 .env
 bench/
+.chromnn
diff --git a/src/momics/config.py b/src/momics/config.py
index f229784..8ce66de 100644
--- a/src/momics/config.py
+++ b/src/momics/config.py
@@ -2,9 +2,9 @@
 import os
 from pathlib import Path
 from typing import Literal, Optional, Union
-
 import tiledb
 
+
 from .logging import logger
 
 DEFAULT_CONFIG_PATH = Path.home() / ".momics.ini"
diff --git a/src/momics/export.py b/src/momics/export.py
index a0b08a4..73fef6f 100644
--- a/src/momics/export.py
+++ b/src/momics/export.py
@@ -1,7 +1,6 @@
 import logging
 import os
 from pathlib import Path
-
 import numpy as np
 import pyBigWig
 import Bio
diff --git a/src/momics/generator.py b/src/momics/generator.py
index 266c78d..58cdf62 100644
--- a/src/momics/generator.py
+++ b/src/momics/generator.py
@@ -1,4 +1,4 @@
-from typing import Optional, Tuple  
+from typing import Optional, Tuple
 
 import numpy as np
 import pyranges as pr