diff --git a/gemgis/download_gemgis_data.py b/gemgis/download_gemgis_data.py
index a999445b..b83f19e2 100644
--- a/gemgis/download_gemgis_data.py
+++ b/gemgis/download_gemgis_data.py
@@ -23,9 +23,7 @@
 import zipfile
 
 
-def create_pooch(storage_url: str,
-                 files: List[str],
-                 target: str):
+def create_pooch(storage_url: str, files: List[str], target: str):
     """
     Create pooch class to fetch files from a website.
 
@@ -51,19 +49,22 @@ def create_pooch(storage_url: str,
         import pooch
     except ModuleNotFoundError:
         raise ModuleNotFoundError(
-            'Pooch package is not installed. Use pip install pooch to install the latest version')
+            "Pooch package is not installed. Use pip install pooch to install the latest version"
+        )
 
     # Create new pooch
-    pc = pooch.create(base_url=storage_url,
-                      path=target,
-                      registry={i: None for i in files})
+    pc = pooch.create(
+        base_url=storage_url, path=target, registry={i: None for i in files}
+    )
 
     return pc
 
 
-def download_tutorial_data(filename: str,
-                           dirpath: str = '',
-                           storage_url: str = 'https://rwth-aachen.sciebo.de/s/AfXRsZywYDbUF34/download?path=%2F'):
+def download_tutorial_data(
+    filename: str,
+    dirpath: str = "",
+    storage_url: str = "https://rwth-aachen.sciebo.de/s/AfXRsZywYDbUF34/download?path=%2F",
+):
     """
     Download the GemGIS data for each tutorial.
 
@@ -83,20 +84,19 @@ def download_tutorial_data(filename: str,
     """
     try:
         from pooch import HTTPDownloader
+
         download = HTTPDownloader(progressbar=False)
     except ModuleNotFoundError:
         raise ModuleNotFoundError(
-            'Pooch package is not installed. Use pip install pooch to install the latest version')
+            "Pooch package is not installed. Use pip install pooch to install the latest version"
+        )
 
     # Creating pooch object
-    pooch_data = create_pooch(storage_url=storage_url,
-                              files=[filename],
-                              target=dirpath)
+    pooch_data = create_pooch(storage_url=storage_url, files=[filename], target=dirpath)
 
     # Downloading data to the defined folder
-    pooch_data.fetch(fname=filename,
-                     downloader=download)
+    pooch_data.fetch(fname=filename, downloader=download)
 
     # Opening zip file and unzip in specified directory
-    with zipfile.ZipFile(dirpath + filename, 'r') as zip_ref:
+    with zipfile.ZipFile(dirpath + filename, "r") as zip_ref:
         zip_ref.extractall(dirpath)