diff --git a/modify_gtfs.py b/modify_gtfs.py
index 5edc79f..8f1d7bc 100644
--- a/modify_gtfs.py
+++ b/modify_gtfs.py
@@ -3,40 +3,54 @@ import sys
 import zipfile
 import pandas as pd
 import tempfile
+import logging
 
 
 def modify_routes(gtfs_file, routes, output_file=None):
+    logging.info(f"Running GTFS Route Type Modifier")
+    logging.info(f"GTFS File: {gtfs_file}")
+    logging.info(f"Routes to Change: {routes}")
+    logging.info(f"Output File: {output_file}")
+
     if not output_file:
         output_file = gtfs_file
 
     # unzip gtfs feed
     with tempfile.TemporaryDirectory() as tmpdirname:
+        logging.info(f"Unzipping GTFS file to {tmpdirname}")
         with zipfile.ZipFile(gtfs_file, 'r') as zip_ref:
             zip_ref.extractall(tmpdirname)
 
         # load routes.txt in a DataFrame
+        logging.info(f"Reading routes.txt")
         routes_path = os.path.join(tmpdirname, 'routes.txt')
         routes_df = pd.read_csv(routes_path)
 
         # edit route types
         for route_change in routes.split(','):
             route_id, new_type = route_change.split(':')
+            logging.info(f"Changing route {route_id} to type {new_type}")
             routes_df.loc[routes_df['route_id'] == route_id, 'route_type'] = int(new_type)
 
         # save to routes.txt
+        logging.info(f"Saving routes.txt")
         routes_df.to_csv(routes_path, index=False)
 
         # recreate zip file
+        logging.info(f"Recreating GTFS file at {output_file}")
         with zipfile.ZipFile(output_file, 'w') as zip_ref:
             for foldername, subfolders, filenames in os.walk(tmpdirname):
                 for filename in filenames:
                     file_path = os.path.join(foldername, filename)
                     zip_ref.write(file_path, os.path.relpath(file_path, tmpdirname))
 
+    logging.info(f"Done!")
 
 if __name__ == "main":
     gtfs_file = sys.argv[1]
     routes = sys.argv[2]
     output_file = sys.argv[3]
 
+    logging.basicConfig(level=logging.INFO)
+
     modify_routes(gtfs_file, routes, output_file)