diff --git a/src/aneris/_io.py b/src/aneris/_io.py
index 0134922..b3192db 100644
--- a/src/aneris/_io.py
+++ b/src/aneris/_io.py
@@ -3,6 +3,7 @@
 
 The default configuration values are provided in aneris.RC_DEFAULTS.
 """
+
 import os
 from collections import abc
 
diff --git a/src/aneris/cli.py b/src/aneris/cli.py
index 13e964a..855b9ac 100644
--- a/src/aneris/cli.py
+++ b/src/aneris/cli.py
@@ -1,6 +1,7 @@
 """
 Harmonization CLI for aneris.
 """
+
 import argparse
 import os
 
diff --git a/src/aneris/utils.py b/src/aneris/utils.py
index 2d5b109..d29ed24 100644
--- a/src/aneris/utils.py
+++ b/src/aneris/utils.py
@@ -113,4 +113,4 @@ def country_name(iso: str):
 
 
 def skipempty(*dfs):
-    return [df for df in dfs if not df.empty]
\ No newline at end of file
+    return [df for df in dfs if not df.empty]