diff --git a/db/sql/migrations/v2.8.91.sql b/db/sql/migrations/v2.8.91.sql
index a584d1dbd..4341e8163 100644
--- a/db/sql/migrations/v2.8.91.sql
+++ b/db/sql/migrations/v2.8.91.sql
@@ -1,5 +1,5 @@
-ALTER TABLE project__user ADD `role` varchar NOT NULL DEFAULT "task_runner";
+ALTER TABLE project__user ADD `role` varchar NOT NULL DEFAULT 'task_runner';
 
-UPDATE project__user SET `role` = "owner" WHEN `admin`;
+UPDATE project__user SET `role` = 'owner' WHEN `admin`;
 
 ALTER TABLE project__user DROP COLUMN `admin`;
\ No newline at end of file