diff --git a/brainprint/brainprint.py b/brainprint/brainprint.py
index 4e4f2a2..7bdab56 100644
--- a/brainprint/brainprint.py
+++ b/brainprint/brainprint.py
@@ -1,5 +1,5 @@
 """
-Definition of the brainprint analysis execution functions.
+Definition of the brainprint analysis execution functions..
 """
 
 import shutil
diff --git a/brainprint/surfaces.py b/brainprint/surfaces.py
index 50091d7..a8aca48 100644
--- a/brainprint/surfaces.py
+++ b/brainprint/surfaces.py
@@ -144,6 +144,7 @@ def create_aseg_surfaces(subject_dir: Path, destination: Path) -> Dict[str, Path
         for label, indices in aseg_labels.items()
     }
 
+
 def create_cortical_surfaces(subject_dir: Path, destination: Path) -> Dict[str, Path]:
     """
     Create cortical surfaces from FreeSurfer labels.
@@ -174,6 +175,7 @@ def create_cortical_surfaces(subject_dir: Path, destination: Path) -> Dict[str,
         for label, name in cortical_labels.items()
     }
 
+
 def create_surfaces(
     subject_dir: Path, destination: Path, skip_cortex: bool = False
 ) -> Dict[str, Path]: