diff --git a/src/main/resources/db/migration/V20260704_1__alter_task_material_url_to_text.sql b/src/main/resources/db/migration/V20260704_1__alter_task_material_url_to_text.sql
new file mode 100644
index 0000000..46069f7
--- /dev/null
+++ b/src/main/resources/db/migration/V20260704_1__alter_task_material_url_to_text.sql
@@ -0,0 +1 @@
+ALTER TABLE tasks MODIFY material_url TEXT null comment '学习材料链接（每行一个）';