diff --git a/api/chalicelib/core/errors.py b/api/chalicelib/core/errors.py
index ba7ce4085..07a7fe200 100644
--- a/api/chalicelib/core/errors.py
+++ b/api/chalicelib/core/errors.py
@@ -135,7 +135,7 @@ def get_details(project_id, error_id, user_id, **data):
                country_partition,
                chart24,
                chart30,
-               COALESCE(tags,'{{}}')::jsonb AS custom_tags
+               COALESCE(tags,'[]')::jsonb AS custom_tags
         FROM (SELECT error_id,
                      name,
                      message,