diff --git a/homelab/rename-one-piece.py b/homelab/rename-one-piece.py
index a73e24c..8f729a5 100644
--- a/homelab/rename-one-piece.py
+++ b/homelab/rename-one-piece.py
@@ -2,6 +2,7 @@
 
 import os
 import re
+import json
 
 ONE_PIECE_SEASON_COUNT = [
     8,  # Season 1
@@ -64,6 +65,7 @@ def _get_new_name(relative_episode_number, actual_season):
 
 
 def main():
+    backup_json = []
     all_files = os.listdir(ONE_PIECE_DIR)
     for f in all_files:
         # skip files that have a season associated with them
@@ -74,7 +76,14 @@ def main():
         season = _get_episode_season(absolute_episode_number)
         season_episode_number = _get_season_episode_number(season, absolute_episode_number)
         new_name = _get_new_name(season_episode_number, season)
-        print(f"Renaming {f} to {new_name}")
+        backup_json.append({"old": f, "new": new_name})
+
+    # write a backup file in case we need to revert
+    with open("/home/cianhatton/rename-one-piece-backup.json", "w") as f:
+        json.dump(backup_json, f, indent=4)
+
+    for item in backup_json:
+        os.rename(f"{ONE_PIECE_DIR}/{item['old']}", f"{ONE_PIECE_DIR}/{item['new']}")
 
 
 if __name__ == "__main__":