diff --git a/modules/store/src/main/resources/db/migration/mariadb/V1.18.0__classifier_model.sql b/modules/store/src/main/resources/db/migration/mariadb/V1.18.0__classifier_model.sql
index 59bec4b2..573dc9d1 100644
--- a/modules/store/src/main/resources/db/migration/mariadb/V1.18.0__classifier_model.sql
+++ b/modules/store/src/main/resources/db/migration/mariadb/V1.18.0__classifier_model.sql
@@ -24,7 +24,7 @@ update `classifier_setting`
 set `category_list_type` = 'whitelist';
 
 update `classifier_setting`
-set `categories` = concat('[`', category, '`]')
+set `categories` = concat('["', `category`, '"]')
 where category is not null;
 
 update `classifier_setting`