diff --git a/models/google_map_review.py b/models/google_map_review.py
index 3bdda65..268297b 100644
--- a/models/google_map_review.py
+++ b/models/google_map_review.py
@@ -51,7 +51,7 @@ class GoogleMapReview(models.Model):
     author_name = fields.Char(string='Reviewer', index=True)
     rating = fields.Float(
         string='Average Rating',
-        group_operator='avg',
+        aggregator='avg',
         digits=(16, 1),
         help='Star rating 1–5.',
     )