diff --git a/scripts/tag_frequency_db.py b/scripts/tag_frequency_db.py
index 5b1b195..a8d6697 100644
--- a/scripts/tag_frequency_db.py
+++ b/scripts/tag_frequency_db.py
@@ -78,6 +78,7 @@ class TagFrequencyDb:
         )
 
     def __get_version(self):
+        db_version = None
         with transaction() as cursor:
             cursor.execute(
                 """