diff --git a/src/main/resources/db/changelog/changes/001-initial-schema.sql b/src/main/resources/db/changelog/changes/001-initial-schema.sql
index 6637962..67ee3c7 100644
--- a/src/main/resources/db/changelog/changes/001-initial-schema.sql
+++ b/src/main/resources/db/changelog/changes/001-initial-schema.sql
@@ -71,7 +71,7 @@ CREATE TABLE IF NOT EXISTS product
     quantity INT
 );
 
-CREATE INDEX ON product (barcode);
+CREATE UNIQUE INDEX barcode_idx ON product (barcode);
 
 CREATE TRIGGER trigger_test_genid
     BEFORE INSERT