diff --git a/update_mongo.py b/update_mongo.py
index e76913c..c8091e2 100755
--- a/update_mongo.py
+++ b/update_mongo.py
@@ -183,7 +183,7 @@ def main() -> int:
     try:
         os.makedirs(tempdir, exist_ok=True)
         out_file = 'tvmaze_updates.json'
-        prev_file = 'post_tvmaze_updates.json'
+        prev_file = f'post_tvmaze_updates.json.{currentTimestamp}'
         previous_updates_file = f"{tempdir}{prev_file}"
         # TVMAZE_URLS is a dict of urls; use the updatesurl if available
         updates_url = TVMAZE_URLS.get('updatesurl') if isinstance(TVMAZE_URLS, dict) else None